mirror of
https://github.com/rust-lang-nursery/rust-cookbook
synced 2024-11-21 19:13:07 +00:00
Async reqwest (#597)
* update reqwest and tokio * Make extract link working with new packages * Make uniq working with new packages * Update get.md * Make rest-post working with new packages * Make API resource exists working with new packages * Make Query the GitHub API working with new packages * Fix typos * update to edition 2018 * Extending reqwest * fix mime request * fix post file * Fix download basic * Remove toml lines * add error handling * Fix partial * Improve coding in unique * Borken links fix * Fix retain example * merging master * Completed updating for async * https://docs.rs/reqwest/0.10.6/reqwest/ references clients and they provided 404 errors * replace anyhow with error-chain * spelling and links Co-authored-by: pollosp <pollo.es.pollo@gmail.com> Co-authored-by: Olopez <pollosp@users.noreply.github.com>
This commit is contained in:
Andrew Gauger
GitHub
parent
b61c8e588a
commit
dd4efa8dcd
17 changed files with 379 additions and 312 deletions
10
Cargo.toml
10
Cargo.toml
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@ -1,11 +1,10 @@
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[package]
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name = "rust-cookbook"
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version = "0.1.0"
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authors = ["Brian Anderson <banderson@mozilla.com>"]
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version = "1.0.0"
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authors = ["Brian Anderson <banderson@mozilla.com>", "Andrew Gauger <andygauge@gmail.com>"]
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edition = "2018"
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license = "MIT/Apache-2.0"
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publish = false
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build = "build.rs"
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[dependencies]
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@ -42,19 +41,20 @@ rand = "0.7.3"
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rand_distr = "0.2.2"
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rayon = "1.0"
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regex = "1.0"
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reqwest = "0.9"
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reqwest = { version = "0.10", features = ["blocking", "json", "stream"] }
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ring = "0.16.11"
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rusqlite = { version = "0.22", features = ["chrono"] }
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same-file = "1.0"
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select = "0.4"
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semver = "0.9"
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serde = "1.0"
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serde = { version = "1.0", features = ["derive"] }
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serde_derive = "1.0"
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serde_json = "1.0"
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tar = "0.4.12"
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tempfile = "3.1"
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threadpool = "1.6"
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toml = "0.4"
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tokio = { version = "0.2", features = ["full"] }
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unicode-segmentation = "1.2.1"
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url = "2.1"
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walkdir = "2.0"
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@ -1 +0,0 @@
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# Error Handling
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@ -6,7 +6,7 @@ The [error-chain] crate makes [matching] on different error types returned by
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a function possible and relatively compact. [`ErrorKind`] determines the error
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type.
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Uses [reqwest] to query a random integer generator web service. Converts
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Uses [reqwest]::[blocking] to query a random integer generator web service. Converts
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the string response into an integer. The Rust standard library,
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[reqwest], and the web service can all generate errors. Well defined Rust errors
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use [`foreign_links`]. An additional [`ErrorKind`] variant for the web service
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@ -15,51 +15,46 @@ error uses `errors` block of the `error_chain!` macro.
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```rust,edition2018
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use error_chain::error_chain;
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use std::io::Read;
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error_chain! {
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foreign_links {
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Io(std::io::Error);
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Reqwest(reqwest::Error);
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ParseIntError(std::num::ParseIntError);
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}
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errors { RandomResponseError(t: String) }
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}
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fn parse_response(mut response: reqwest::Response) -> Result<u32> {
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let mut body = String::new();
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response.read_to_string(&mut body)?;
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body.pop();
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body.parse::<u32>()
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.chain_err(|| ErrorKind::RandomResponseError(body))
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fn parse_response(response: reqwest::blocking::Response) -> Result<u32> {
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let mut body = response.text()?;
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body.pop();
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body
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.parse::<u32>()
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.chain_err(|| ErrorKind::RandomResponseError(body))
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}
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fn run() -> Result<()> {
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let url =
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format!("https://www.random.org/integers/?num=1&min=0&max=10&col=1&base=10&format=plain");
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let response = reqwest::get(&url)?;
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let random_value: u32 = parse_response(response)?;
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println!("a random number between 0 and 10: {}", random_value);
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Ok(())
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let url =
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format!("https://www.random.org/integers/?num=1&min=0&max=10&col=1&base=10&format=plain");
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let response = reqwest::blocking::get(&url)?;
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let random_value: u32 = parse_response(response)?;
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println!("a random number between 0 and 10: {}", random_value);
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Ok(())
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}
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fn main() {
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if let Err(error) = run() {
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match *error.kind() {
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ErrorKind::Io(_) => println!("Standard IO error: {:?}", error),
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ErrorKind::Reqwest(_) => println!("Reqwest error: {:?}", error),
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ErrorKind::ParseIntError(_) => println!("Standard parse int error: {:?}", error),
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ErrorKind::RandomResponseError(_) => println!("User defined error: {:?}", error),
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_ => println!("Other error: {:?}", error),
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}
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if let Err(error) = run() {
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match *error.kind() {
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ErrorKind::Io(_) => println!("Standard IO error: {:?}", error),
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ErrorKind::Reqwest(_) => println!("Reqwest error: {:?}", error),
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ErrorKind::ParseIntError(_) => println!("Standard parse int error: {:?}", error),
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ErrorKind::RandomResponseError(_) => println!("User defined error: {:?}", error),
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_ => println!("Other error: {:?}", error),
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}
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}
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}
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```
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[`ErrorKind`]: https://docs.rs/error-chain/*/error_chain/example_generated/enum.ErrorKind.html
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[`foreign_links`]: https://docs.rs/error-chain/*/error_chain/#foreign-links
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[blocking]: https://docs.rs/reqwest/*/reqwest/blocking/index.html
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[Matching]:https://docs.rs/error-chain/*/error_chain/#matching-errors
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23
src/web.md
23
src/web.md
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@ -26,8 +26,18 @@
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| [Get MIME type from filename][ex-mime-from-filename] | [![mime-badge]][mime] | [![cat-encoding-badge]][cat-encoding] |
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| [Parse the MIME type of a HTTP response][ex-http-response-mime-type] | [![mime-badge]][mime] [![reqwest-badge]][reqwest] | [![cat-net-badge]][cat-net] [![cat-encoding-badge]][cat-encoding] |
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## Clients
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{{#include web/clients.md}}
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| Recipe | Crates | Categories |
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|--------|--------|------------|
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| [Make a HTTP GET request][ex-url-basic] | [![reqwest-badge]][reqwest] | [![cat-net-badge]][cat-net] |
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| [Query the GitHub API][ex-rest-get] | [![reqwest-badge]][reqwest] [![serde-badge]][serde] | [![cat-net-badge]][cat-net] [![cat-encoding-badge]][cat-encoding] |
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| [Check if an API resource exists][ex-rest-head] | [![reqwest-badge]][reqwest] | [![cat-net-badge]][cat-net] |
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| [Create and delete Gist with GitHub API][ex-rest-post] | [![reqwest-badge]][reqwest] [![serde-badge]][serde] | [![cat-net-badge]][cat-net] [![cat-encoding-badge]][cat-encoding] |
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| [Consume a paginated RESTful API][ex-paginated-api] | [![reqwest-badge]][reqwest] [![serde-badge]][serde] | [![cat-net-badge]][cat-net] [![cat-encoding-badge]][cat-encoding] |
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| [Download a file to a temporary directory][ex-url-download] | [![reqwest-badge]][reqwest] [![tempdir-badge]][tempdir] | [![cat-net-badge]][cat-net] [![cat-filesystem-badge]][cat-filesystem] |
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| [Make a partial download with HTTP range headers][ex-progress-with-range] | [![reqwest-badge]][reqwest] | [![cat-net-badge]][cat-net] |
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| [POST a file to paste-rs][ex-file-post] | [![reqwest-badge]][reqwest] | [![cat-net-badge]][cat-net] |
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[ex-extract-links-webpage]: web/scraping.html#extract-all-links-from-a-webpage-html
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[ex-check-broken-links]: web/scraping.html#check-a-webpage-for-broken-links
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@ -43,4 +53,15 @@
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[ex-mime-from-filename]: web/mime.html#get-mime-type-from-filename
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[ex-http-response-mime-type]: web/mime.html#parse-the-mime-type-of-a-http-response
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[ex-url-basic]: web/clients/requests.html#make-a-http-get-request
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[ex-rest-custom-params]: web/clients/requests.html#set-custom-headers-and-url-parameters-for-a-rest-request
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[ex-rest-get]: web/clients/apis.html#query-the-github-api
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[ex-rest-head]: web/clients/apis.html#check-if-an-api-resource-exists
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[ex-rest-post]: web/clients/apis.html#create-and-delete-gist-with-github-api
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[ex-paginated-api]: web/clients/apis.html#consume-a-paginated-restful-api
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[ex-handle-rate-limited-api]: web/clients/apis.html#handle-a-rate-limited-api
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[ex-url-download]: web/clients/download.html#download-a-file-to-a-temporary-directory
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[ex-progress-with-range]: web/clients/download.html#make-a-partial-download-with-http-range-headers
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[ex-file-post]: web/clients/download.html#post-a-file-to-paste-rs
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{{#include links.md}}
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@ -11,15 +11,15 @@
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| [Make a partial download with HTTP range headers][ex-progress-with-range] | [![reqwest-badge]][reqwest] | [![cat-net-badge]][cat-net] |
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| [POST a file to paste-rs][ex-file-post] | [![reqwest-badge]][reqwest] | [![cat-net-badge]][cat-net] |
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[ex-url-basic]: web/clients/requests.html#make-a-http-get-request
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[ex-rest-custom-params]: web/clients/requests.html#set-custom-headers-and-url-parameters-for-a-rest-request
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[ex-rest-get]: web/clients/apis.html#query-the-github-api
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[ex-rest-head]: web/clients/apis.html#check-if-an-api-resource-exists
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[ex-rest-post]: web/clients/apis.html#create-and-delete-gist-with-github-api
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[ex-paginated-api]: web/clients/apis.html#consume-a-paginated-restful-api
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[ex-handle-rate-limited-api]: web/clients/apis.html#handle-a-rate-limited-api
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[ex-url-download]: web/clients/download.html#download-a-file-to-a-temporary-directory
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[ex-progress-with-range]: web/clients/download.html#make-a-partial-download-with-http-range-headers
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[ex-file-post]: web/clients/download.html#post-a-file-to-paste-rs
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[ex-url-basic]: clients/requests.html#make-a-http-get-request
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[ex-rest-custom-params]: clients/requests.html#set-custom-headers-and-url-parameters-for-a-rest-request
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[ex-rest-get]: clients/apis.html#query-the-github-api
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[ex-rest-head]: clients/apis.html#check-if-an-api-resource-exists
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[ex-rest-post]: clients/apis.html#create-and-delete-gist-with-github-api
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[ex-paginated-api]: clients/apis.html#consume-a-paginated-restful-api
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[ex-handle-rate-limited-api]: clients/apis.html#handle-a-rate-limited-api
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[ex-url-download]: clients/download.html#download-a-file-to-a-temporary-directory
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[ex-progress-with-range]: clients/download.html#make-a-partial-download-with-http-range-headers
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[ex-file-post]: clients/download.html#post-a-file-to-paste-rs
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{{#include ../links.md}}
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@ -7,8 +7,8 @@ fetches the next page of results from the remote server as it arrives at the end
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of each page.
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```rust,edition2018,no_run
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use reqwest::Result;
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use serde::Deserialize;
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use reqwest::Error;
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#[derive(Deserialize)]
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struct ApiResponse {
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@ -29,25 +29,25 @@ struct Meta {
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struct ReverseDependencies {
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crate_id: String,
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dependencies: <Vec<Dependency> as IntoIterator>::IntoIter,
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client: reqwest::Client,
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client: reqwest::blocking::Client,
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page: u32,
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per_page: u32,
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total: u32,
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}
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impl ReverseDependencies {
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fn of(crate_id: &str) -> Result<Self, Error> {
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fn of(crate_id: &str) -> Result<Self> {
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Ok(ReverseDependencies {
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crate_id: crate_id.to_owned(),
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dependencies: vec![].into_iter(),
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client: reqwest::Client::new(),
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client: reqwest::blocking::Client::new(),
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page: 0,
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per_page: 100,
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total: 0,
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})
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}
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fn try_next(&mut self) -> Result<Option<Dependency>, Error> {
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fn try_next(&mut self) -> Result<Option<Dependency>> {
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if let Some(dep) = self.dependencies.next() {
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return Ok(Some(dep));
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}
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@ -70,7 +70,7 @@ impl ReverseDependencies {
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}
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impl Iterator for ReverseDependencies {
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type Item = Result<Dependency, Error>;
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type Item = Result<Dependency>;
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fn next(&mut self) -> Option<Self::Item> {
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match self.try_next() {
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@ -81,7 +81,7 @@ impl Iterator for ReverseDependencies {
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}
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}
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fn main() -> Result<(), Error> {
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fn main() -> Result<()> {
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for dep in ReverseDependencies::of("serde")? {
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println!("reverse dependency: {}", dep?.crate_id);
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}
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|
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@ -3,7 +3,11 @@
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[![reqwest-badge]][reqwest] [![serde-badge]][serde] [![cat-net-badge]][cat-net] [![cat-encoding-badge]][cat-encoding]
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Queries GitHub [stargazers API v3](https://developer.github.com/v3/activity/starring/#list-stargazers)
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with [`reqwest::get`] to get list of all users who have marked a GitHub project with a star. [`reqwest::Response`] is deserialized with [`Response::json`] into `User` objects implementing [`serde::Deserialize`].
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with [`reqwest::get`] to get list of all users who have marked a GitHub project with a star.
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[`reqwest::Response`] is deserialized with [`Response::json`] into `User` objects implementing [`serde::Deserialize`].
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[tokio::main] is used to set up the async executor and the process waits for [`reqwet::get`] to complete before
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processing the response into User instances.
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```rust,edition2018,no_run
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use serde::Deserialize;
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@ -15,14 +19,15 @@ struct User {
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id: u32,
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}
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fn main() -> Result<(), Error> {
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#[tokio::main]
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async fn main() -> Result<(), Error> {
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let request_url = format!("https://api.github.com/repos/{owner}/{repo}/stargazers",
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owner = "rust-lang-nursery",
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repo = "rust-cookbook");
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println!("{}", request_url);
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let mut response = reqwest::get(&request_url)?;
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let response = reqwest::get(&request_url).await?;
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let users: Vec<User> = response.json()?;
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let users: Vec<User> = response.json().await?;
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println!("{:?}", users);
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Ok(())
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}
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|
|
|
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|
|
@ -8,21 +8,23 @@ success. This is a quick way to query a rest resource without needing to receive
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a body. [`reqwest::Client`] cofigured with [`ClientBuilder::timeout`] ensures
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a request will not last longer than a timeout.
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|
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```rust,edition2018,no_run
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Due to both [`ClientBuilder::build`] and [`ReqwestBuilder::send`] returning [`reqwest::Error`]
|
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types, the shortcut [`reqwest::Result`] is used for the main function return type.
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|
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use reqwest::Error;
|
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```rust,edition2018,no_run
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use reqwest::Result;
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use std::time::Duration;
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use reqwest::ClientBuilder;
|
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|
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|
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fn main() -> Result<(), Error> {
|
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#[tokio::main]
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async fn main() -> Result<()> {
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let user = "ferris-the-crab";
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let request_url = format!("https://api.github.com/users/{}", user);
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println!("{}", request_url);
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let timeout = Duration::new(5, 0);
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let client = ClientBuilder::new().timeout(timeout).build()?;
|
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let response = client.head(&request_url).send()?;
|
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let response = client.head(&request_url).send().await?;
|
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|
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if response.status().is_success() {
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println!("{} is a user!", user);
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|
|
@ -34,6 +36,10 @@ fn main() -> Result<(), Error> {
|
|||
}
|
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```
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|
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[`ClientBuilder::build`]: https://docs.rs/reqwest/*/reqwest/struct.ClientBuilder.html#method.build
|
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[`Client::head`]: https://docs.rs/reqwest/*/reqwest/struct.Client.html#method.head
|
||||
[`ClientBuilder::timeout`]: https://docs.rs/reqwest/*/reqwest/struct.ClientBuilder.html#method.timeout
|
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[`RequestBuilder::send`]: https://docs.rs/reqwest/*/reqwest/struct.RequestBuilder.html#method.send
|
||||
[`reqwest::Client`]: https://docs.rs/reqwest/*/reqwest/struct.Client.html
|
||||
[`reqwest::Error`]: https://docs.rs/reqwest/*/reqwest/struct.Error.html
|
||||
[`reqwest::Result`]:https://docs.rs/reqwest/*/reqwest/type.Result.html
|
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|
|
@ -12,19 +12,18 @@ body. [`RequestBuilder::basic_auth`] handles authentication. The call to
|
|||
[`RequestBuilder::send`] synchronously executes the requests.
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
use error_chain::error_chain;
|
||||
use serde::Deserialize;
|
||||
use serde_json::json;
|
||||
|
||||
use serde_json::json;
|
||||
use std::env;
|
||||
use reqwest::Client;
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# EnvVar(env::VarError);
|
||||
# HttpRequest(reqwest::Error);
|
||||
# }
|
||||
# }
|
||||
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
EnvVar(env::VarError);
|
||||
HttpRequest(reqwest::Error);
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Deserialize, Debug)]
|
||||
struct Gist {
|
||||
|
|
@ -32,7 +31,8 @@ struct Gist {
|
|||
html_url: String,
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()> {
|
||||
let gh_user = env::var("GH_USER")?;
|
||||
let gh_pass = env::var("GH_PASS")?;
|
||||
|
||||
|
|
@ -46,20 +46,20 @@ fn main() -> Result<()> {
|
|||
}});
|
||||
|
||||
let request_url = "https://api.github.com/gists";
|
||||
let mut response = Client::new()
|
||||
let response = Client::new()
|
||||
.post(request_url)
|
||||
.basic_auth(gh_user.clone(), Some(gh_pass.clone()))
|
||||
.json(&gist_body)
|
||||
.send()?;
|
||||
.send().await?;
|
||||
|
||||
let gist: Gist = response.json()?;
|
||||
let gist: Gist = response.json().await?;
|
||||
println!("Created {:?}", gist);
|
||||
|
||||
let request_url = format!("{}/{}",request_url, gist.id);
|
||||
let response = Client::new()
|
||||
.delete(&request_url)
|
||||
.basic_auth(gh_user, Some(gh_pass))
|
||||
.send()?;
|
||||
.send().await?;
|
||||
|
||||
println!("Gist {} deleted! Status code: {}",gist.id, response.status());
|
||||
Ok(())
|
||||
|
|
|
|||
|
|
@ -2,31 +2,31 @@
|
|||
|
||||
[![reqwest-badge]][reqwest] [![tempdir-badge]][tempdir] [![cat-net-badge]][cat-net] [![cat-filesystem-badge]][cat-filesystem]
|
||||
|
||||
Creates a temporary directory with [`tempfile::Builder`] and synchronously downloads
|
||||
a file over HTTP using [`reqwest::get`].
|
||||
Creates a temporary directory with [`tempfile::Builder`] and downloads
|
||||
a file over HTTP using [`reqwest::get`] asynchronously.
|
||||
|
||||
Creates a target [`File`] with name obtained from [`Response::url`] within
|
||||
[`tempdir()`] and copies downloaded data into it with [`io::copy`].
|
||||
The temporary directory is automatically removed on `run` function return.
|
||||
The temporary directory is automatically removed on program exit.
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
|
||||
use error_chain::error_chain;
|
||||
use std::io::copy;
|
||||
use std::fs::File;
|
||||
use tempfile::Builder;
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# Io(std::io::Error);
|
||||
# HttpRequest(reqwest::Error);
|
||||
# }
|
||||
# }
|
||||
|
||||
fn main() -> Result<()> {
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
Io(std::io::Error);
|
||||
HttpRequest(reqwest::Error);
|
||||
}
|
||||
}
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()> {
|
||||
let tmp_dir = Builder::new().prefix("example").tempdir()?;
|
||||
let target = "https://www.rust-lang.org/logos/rust-logo-512x512.png";
|
||||
let mut response = reqwest::get(target)?;
|
||||
let response = reqwest::get(target).await?;
|
||||
|
||||
let mut dest = {
|
||||
let fname = response
|
||||
|
|
@ -41,7 +41,8 @@ fn main() -> Result<()> {
|
|||
println!("will be located under: '{:?}'", fname);
|
||||
File::create(fname)?
|
||||
};
|
||||
copy(&mut response, &mut dest)?;
|
||||
let content = response.text().await?;
|
||||
copy(&mut content.as_bytes(), &mut dest)?;
|
||||
Ok(())
|
||||
}
|
||||
```
|
||||
|
|
|
|||
|
|
@ -2,101 +2,97 @@
|
|||
|
||||
[![reqwest-badge]][reqwest] [![cat-net-badge]][cat-net]
|
||||
|
||||
Uses [`reqwest::Client::head`] to get the [Content-Length] of the response.
|
||||
Uses [`reqwest::blocking::Client::head`] to get the [Content-Length] of the response.
|
||||
|
||||
The code then uses [`reqwest::Client::get`] to download the content in
|
||||
chunks of 10240 bytes, while printing progress messages. The [Range] header specifies the chunk size and position.
|
||||
The code then uses [`reqwest::blocking::Client::get`] to download the content in
|
||||
chunks of 10240 bytes, while printing progress messages. This exmple uses the synchronous
|
||||
reqwest module. The [Range] header specifies the chunk size and position.
|
||||
|
||||
The Range header is defined in [RFC7233][HTTP Range RFC7233].
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
|
||||
use std::fs::File;
|
||||
use std::str::FromStr;
|
||||
use error_chain::error_chain;
|
||||
use reqwest::header::{HeaderValue, CONTENT_LENGTH, RANGE};
|
||||
use reqwest::StatusCode;
|
||||
use std::fs::File;
|
||||
use std::str::FromStr;
|
||||
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# Io(std::io::Error);
|
||||
# Reqwest(reqwest::Error);
|
||||
# Header(reqwest::header::ToStrError);
|
||||
# }
|
||||
# }
|
||||
#
|
||||
# struct PartialRangeIter {
|
||||
# start: u64,
|
||||
# end: u64,
|
||||
# buffer_size: u32,
|
||||
# }
|
||||
#
|
||||
# impl PartialRangeIter {
|
||||
# pub fn new(start: u64, end: u64, buffer_size: u32) -> Result<Self> {
|
||||
# if buffer_size == 0 {
|
||||
# Err("invalid buffer_size, give a value greater than zero.")?;
|
||||
# }
|
||||
#
|
||||
# Ok(PartialRangeIter {
|
||||
# start,
|
||||
# end,
|
||||
# buffer_size,
|
||||
# })
|
||||
# }
|
||||
# }
|
||||
#
|
||||
# impl Iterator for PartialRangeIter {
|
||||
# type Item = HeaderValue;
|
||||
#
|
||||
# fn next(&mut self) -> Option<Self::Item> {
|
||||
# if self.start > self.end {
|
||||
# None
|
||||
# } else {
|
||||
# let prev_start = self.start;
|
||||
# self.start += std::cmp::min(self.buffer_size as u64, self.end - self.start + 1);
|
||||
# // NOTE(unwrap): `HeaderValue::from_str` will fail only if the value is not made
|
||||
# // of visible ASCII characters. Since the format string is static and the two
|
||||
# // values are integers, that can't happen.
|
||||
# Some(HeaderValue::from_str(&format!("bytes={}-{}", prev_start, self.start - 1)).unwrap())
|
||||
# }
|
||||
# }
|
||||
# }
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
Io(std::io::Error);
|
||||
Reqwest(reqwest::Error);
|
||||
Header(reqwest::header::ToStrError);
|
||||
}
|
||||
}
|
||||
|
||||
struct PartialRangeIter {
|
||||
start: u64,
|
||||
end: u64,
|
||||
buffer_size: u32,
|
||||
}
|
||||
|
||||
impl PartialRangeIter {
|
||||
pub fn new(start: u64, end: u64, buffer_size: u32) -> Result<Self> {
|
||||
if buffer_size == 0 {
|
||||
Err("invalid buffer_size, give a value greater than zero.")?;
|
||||
}
|
||||
Ok(PartialRangeIter {
|
||||
start,
|
||||
end,
|
||||
buffer_size,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
impl Iterator for PartialRangeIter {
|
||||
type Item = HeaderValue;
|
||||
fn next(&mut self) -> Option<Self::Item> {
|
||||
if self.start > self.end {
|
||||
None
|
||||
} else {
|
||||
let prev_start = self.start;
|
||||
self.start += std::cmp::min(self.buffer_size as u64, self.end - self.start + 1);
|
||||
Some(HeaderValue::from_str(&format!("bytes={}-{}", prev_start, self.start - 1)).expect("string provided by format!"))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let url = "https://httpbin.org/range/102400?duration=2";
|
||||
const CHUNK_SIZE: u32 = 10240;
|
||||
|
||||
let client = reqwest::Client::new();
|
||||
let response = client.head(url).send()?;
|
||||
let length = response
|
||||
.headers()
|
||||
.get(CONTENT_LENGTH)
|
||||
.ok_or("response doesn't include the content length")?;
|
||||
let length = u64::from_str(length.to_str()?).map_err(|_| "invalid Content-Length header")?;
|
||||
|
||||
let mut output_file = File::create("download.bin")?;
|
||||
|
||||
println!("starting download...");
|
||||
for range in PartialRangeIter::new(0, length - 1, CHUNK_SIZE)? {
|
||||
println!("range {:?}", range);
|
||||
let mut response = client.get(url).header(RANGE, range).send()?;
|
||||
|
||||
let status = response.status();
|
||||
if !(status == StatusCode::OK || status == StatusCode::PARTIAL_CONTENT) {
|
||||
error_chain::bail!("Unexpected server response: {}", status)
|
||||
}
|
||||
|
||||
std::io::copy(&mut response, &mut output_file)?;
|
||||
let url = "https://httpbin.org/range/102400?duration=2";
|
||||
const CHUNK_SIZE: u32 = 10240;
|
||||
|
||||
let client = reqwest::blocking::Client::new();
|
||||
let response = client.head(url).send()?;
|
||||
let length = response
|
||||
.headers()
|
||||
.get(CONTENT_LENGTH)
|
||||
.ok_or("response doesn't include the content length")?;
|
||||
let length = u64::from_str(length.to_str()?).map_err(|_| "invalid Content-Length header")?;
|
||||
|
||||
let mut output_file = File::create("download.bin")?;
|
||||
|
||||
println!("starting download...");
|
||||
for range in PartialRangeIter::new(0, length - 1, CHUNK_SIZE)? {
|
||||
println!("range {:?}", range);
|
||||
let mut response = client.get(url).header(RANGE, range).send()?;
|
||||
|
||||
let status = response.status();
|
||||
if !(status == StatusCode::OK || status == StatusCode::PARTIAL_CONTENT) {
|
||||
error_chain::bail!("Unexpected server response: {}", status)
|
||||
}
|
||||
std::io::copy(&mut response, &mut output_file)?;
|
||||
}
|
||||
|
||||
let content = response.text()?;
|
||||
std::io::copy(&mut content.as_bytes(), &mut output_file)?;
|
||||
|
||||
println!("Finished with success!");
|
||||
Ok(())
|
||||
println!("Finished with success!");
|
||||
Ok(())
|
||||
}
|
||||
```
|
||||
|
||||
[`reqwest::Client::get`]: https://docs.rs/reqwest/*/reqwest/struct.Client.html#method.get
|
||||
[`reqwest::Client::head`]: https://docs.rs/reqwest/*/reqwest/struct.Client.html#method.head
|
||||
[`reqwest::blocking::Client::get`]: https://docs.rs/reqwest/*/reqwest/blocking/struct.Client.html#method.get
|
||||
[`reqwest::blocking::Client::head`]: https://docs.rs/reqwest/*/reqwest/blocking/struct.Client.html#method.head
|
||||
[Content-Length]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Length
|
||||
[Range]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Range
|
||||
|
||||
|
|
|
|||
|
|
@ -10,28 +10,32 @@ the file uploads and the response returns. [`read_to_string`] returns the
|
|||
response and displays in the console.
|
||||
|
||||
```rust,edition2018,no_run
|
||||
|
||||
# use error_chain::error_chain;
|
||||
#
|
||||
use error_chain::error_chain;
|
||||
use std::fs::File;
|
||||
use std::io::Read;
|
||||
use reqwest::Client;
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# HttpRequest(reqwest::Error);
|
||||
# IoError(::std::io::Error);
|
||||
# }
|
||||
# }
|
||||
|
||||
fn main() -> Result<()> {
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
HttpRequest(reqwest::Error);
|
||||
IoError(::std::io::Error);
|
||||
}
|
||||
}
|
||||
#[tokio::main]
|
||||
|
||||
async fn main() -> Result<()> {
|
||||
let paste_api = "https://paste.rs";
|
||||
let file = File::open("message")?;
|
||||
let mut file = File::open("message")?;
|
||||
|
||||
let mut response = Client::new().post(paste_api).body(file).send()?;
|
||||
let mut response_body = String::new();
|
||||
response.read_to_string(&mut response_body)?;
|
||||
println!("Your paste is located at: {}", response_body);
|
||||
let mut contents = String::new();
|
||||
file.read_to_string(&mut contents)?;
|
||||
|
||||
let client = reqwest::Client::new();
|
||||
let res = client.post(paste_api)
|
||||
.body(contents)
|
||||
.send()
|
||||
.await?;
|
||||
let response_text = res.text().await?;
|
||||
println!("Your paste is located at: {}",response_text );
|
||||
Ok(())
|
||||
}
|
||||
```
|
||||
|
|
|
|||
|
|
@ -3,24 +3,24 @@
|
|||
[![reqwest-badge]][reqwest] [![cat-net-badge]][cat-net]
|
||||
|
||||
Parses the supplied URL and makes a synchronous HTTP GET request
|
||||
with [`reqwest::get`]. Prints obtained [`reqwest::Response`]
|
||||
with [`reqwest::blocking::get`]. Prints obtained [`reqwest::blocking::Response`]
|
||||
status and headers. Reads HTTP response body into an allocated [`String`]
|
||||
using [`read_to_string`].
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
|
||||
```rust,edition2018,no_run
|
||||
use error_chain::error_chain;
|
||||
use std::io::Read;
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# Io(std::io::Error);
|
||||
# HttpRequest(reqwest::Error);
|
||||
# }
|
||||
# }
|
||||
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
Io(std::io::Error);
|
||||
HttpRequest(reqwest::Error);
|
||||
}
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let mut res = reqwest::get("http://httpbin.org/get")?;
|
||||
let mut res = reqwest::blocking::get("http://httpbin.org/get")?;
|
||||
let mut body = String::new();
|
||||
res.read_to_string(&mut body)?;
|
||||
|
||||
|
|
@ -30,9 +30,47 @@ fn main() -> Result<()> {
|
|||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
## Async
|
||||
|
||||
A similar approach can be used by including the [`tokio`] executor
|
||||
to make the main function asynchronous, retrieving the same information.
|
||||
|
||||
In this example, [`tokio::main`] handles all the heavy executor setup
|
||||
and allows sequential code implemented without blocking until `.await`.
|
||||
|
||||
Uses the asynchronous versions of [reqwest], both [`reqwest::get`] and
|
||||
[`reqwest::Response`].
|
||||
|
||||
```rust,no_run
|
||||
use error_chain::error_chain;
|
||||
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
Io(std::io::Error);
|
||||
HttpRequest(reqwest::Error);
|
||||
}
|
||||
}
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()> {
|
||||
let res = reqwest::get("http://httpbin.org/get").await?;
|
||||
println!("Status: {}", res.status());
|
||||
println!("Headers:\n{:#?}", res.headers());
|
||||
|
||||
let body = res.text().await?;
|
||||
println!("Body:\n{}", body);
|
||||
Ok(())
|
||||
}
|
||||
```
|
||||
|
||||
[`read_to_string`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_to_string
|
||||
[`reqwest::blocking::get`]: https://docs.rs/reqwest/*/reqwest/blocking/fn.get.html
|
||||
[`reqwest::blocking::Response`]: https://docs.rs/reqwest/*/reqwest/blocking/struct.Response.html
|
||||
[`reqwest::get`]: https://docs.rs/reqwest/*/reqwest/fn.get.html
|
||||
[`reqwest::Response`]: https://docs.rs/reqwest/*/reqwest/struct.Response.html
|
||||
[`String`]: https://doc.rust-lang.org/std/string/struct.String.html
|
||||
[`tokio`]: https://docs.rs/crate/tokio/0.2.11
|
||||
[`tokio::main`]: https://tokio.rs/docs/getting-started/hello-world/#let-s-write-some-code
|
||||
|
|
@ -7,28 +7,27 @@ found in the [Content-Type] header. [`reqwest::header::HeaderMap::get`] retrieve
|
|||
the header as a [`reqwest::header::HeaderValue`], which can be converted to a
|
||||
string. The `mime` crate can then parse that, yielding a [`mime::Mime`] value.
|
||||
|
||||
The `mime` crate also defines some commonly used MIME types.
|
||||
The [`mime`] crate also defines some commonly used MIME types.
|
||||
|
||||
Note that the [`reqwest::header`] module is exported from the [`http`] crate.
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
|
||||
use error_chain::error_chain;
|
||||
use mime::Mime;
|
||||
use std::str::FromStr;
|
||||
use reqwest::header::CONTENT_TYPE;
|
||||
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# Reqwest(reqwest::Error);
|
||||
# Header(reqwest::header::ToStrError);
|
||||
# Mime(mime::FromStrError);
|
||||
# }
|
||||
# }
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
Reqwest(reqwest::Error);
|
||||
Header(reqwest::header::ToStrError);
|
||||
Mime(mime::FromStrError);
|
||||
}
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let response = reqwest::get("https://www.rust-lang.org/logos/rust-logo-32x32.png")?;
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()> {
|
||||
let response = reqwest::get("https://www.rust-lang.org/logos/rust-logo-32x32.png").await?;
|
||||
let headers = response.headers();
|
||||
|
||||
match headers.get(CONTENT_TYPE) {
|
||||
|
|
|
|||
|
|
@ -6,72 +6,76 @@ Call `get_base_url` to retrieve the base URL. If the document has a base tag,
|
|||
get the href [`attr`] from base tag. [`Position::BeforePath`] of the original
|
||||
URL acts as a default.
|
||||
|
||||
Iterate through links in the document and parse with [`url::ParseOptions`]
|
||||
and [`Url::parse`]). Makes a request to the links with reqwest and verifies
|
||||
[`StatusCode`].
|
||||
Iterates through links in the document and creates a [`tokio::spawn`] task that will
|
||||
parse an individual link with [`url::ParseOptions`] and [`Url::parse`]).
|
||||
The task makes a request to the links with [reqwest] and verifies
|
||||
[`StatusCode`]. Then the tasks `await` completion before ending the program.
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
|
||||
use std::collections::HashSet;
|
||||
|
||||
use url::{Url, Position};
|
||||
use error_chain::error_chain;
|
||||
use reqwest::StatusCode;
|
||||
use select::document::Document;
|
||||
use select::predicate::Name;
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# ReqError(reqwest::Error);
|
||||
# IoError(std::io::Error);
|
||||
# UrlParseError(url::ParseError);
|
||||
# }
|
||||
# }
|
||||
use std::collections::HashSet;
|
||||
use tokio::stream::{self, StreamExt};
|
||||
use url::{Position, Url};
|
||||
|
||||
fn get_base_url(url: &Url, doc: &Document) -> Result<Url> {
|
||||
let base_tag_href = doc.find(Name("base")).filter_map(|n| n.attr("href")).nth(0);
|
||||
|
||||
let base_url = base_tag_href.map_or_else(
|
||||
|| Url::parse(&url[..Position::BeforePath]),
|
||||
Url::parse,
|
||||
)?;
|
||||
|
||||
Ok(base_url)
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
ReqError(reqwest::Error);
|
||||
IoError(std::io::Error);
|
||||
UrlParseError(url::ParseError);
|
||||
JoinError(tokio::task::JoinError);
|
||||
}
|
||||
}
|
||||
|
||||
fn check_link(url: &Url) -> Result<bool> {
|
||||
let res = reqwest::get(url.as_ref())?;
|
||||
|
||||
Ok(res.status() != StatusCode::NOT_FOUND)
|
||||
async fn get_base_url(url: &Url, doc: &Document) -> Result<Url> {
|
||||
let base_tag_href = doc.find(Name("base")).filter_map(|n| n.attr("href")).nth(0);
|
||||
let base_url =
|
||||
base_tag_href.map_or_else(|| Url::parse(&url[..Position::BeforePath]), Url::parse)?;
|
||||
Ok(base_url)
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let url = Url::parse("https://www.rust-lang.org/en-US/")?;
|
||||
async fn check_link(url: &Url) -> Result<bool> {
|
||||
let res = reqwest::get(url.as_ref()).await?;
|
||||
Ok(res.status() != StatusCode::NOT_FOUND)
|
||||
}
|
||||
|
||||
let res = reqwest::get(url.as_ref())?;
|
||||
let document = Document::from_read(res)?;
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()> {
|
||||
let url = Url::parse("https://www.rust-lang.org/en-US/")?;
|
||||
let res = reqwest::get(url.as_ref()).await?.text().await?;
|
||||
let document = Document::from(res.as_str());
|
||||
let base_url = get_base_url(&url, &document).await?;
|
||||
let base_parser = Url::options().base_url(Some(&base_url));
|
||||
let links: HashSet<Url> = document
|
||||
.find(Name("a"))
|
||||
.filter_map(|n| n.attr("href"))
|
||||
.filter_map(|link| base_parser.parse(link).ok())
|
||||
.collect();
|
||||
let mut tasks = vec![];
|
||||
|
||||
let base_url = get_base_url(&url, &document)?;
|
||||
for link in links {
|
||||
tasks.push(tokio::spawn(async move {
|
||||
if check_link(&link).await.unwrap() {
|
||||
println!("{} is OK", link);
|
||||
} else {
|
||||
println!("{} is Broken", link);
|
||||
}
|
||||
}));
|
||||
}
|
||||
|
||||
let base_parser = Url::options().base_url(Some(&base_url));
|
||||
for task in tasks {
|
||||
task.await?
|
||||
}
|
||||
|
||||
let links: HashSet<Url> = document
|
||||
.find(Name("a"))
|
||||
.filter_map(|n| n.attr("href"))
|
||||
.filter_map(|link| base_parser.parse(link).ok())
|
||||
.collect();
|
||||
|
||||
links
|
||||
.iter()
|
||||
.filter(|link| check_link(link).ok() == Some(false))
|
||||
.for_each(|x| println!("{} is broken.", x));
|
||||
|
||||
Ok(())
|
||||
Ok(())
|
||||
}
|
||||
```
|
||||
|
||||
[`attr`]: https://docs.rs/select/*/select/node/struct.Node.html#method.attr
|
||||
[`Position::BeforePath`]: https://docs.rs/url/*/url/enum.Position.html#variant.BeforePath
|
||||
[`StatusCode`]: https://docs.rs/reqwest/*/reqwest/struct.StatusCode.html
|
||||
[`tokio::spawn`]: https://docs.rs/tokio/*/tokio/fn.spawn.html
|
||||
[`url::Parse`]: https://docs.rs/url/*/url/struct.Url.html#method.parse
|
||||
[`url::ParseOptions`]: https://docs.rs/url/*/url/struct.ParseOptions.html
|
||||
|
|
|
|||
|
|
@ -9,28 +9,32 @@ Call [`filter_map`] on the [`Selection`] retrieves URLs
|
|||
from links that have the "href" [`attr`] (attribute).
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
|
||||
use error_chain::error_chain;
|
||||
use select::document::Document;
|
||||
use select::predicate::Name;
|
||||
#
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# ReqError(reqwest::Error);
|
||||
# IoError(std::io::Error);
|
||||
# }
|
||||
# }
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let res = reqwest::get("https://www.rust-lang.org/en-US/")?;
|
||||
|
||||
Document::from_read(res)?
|
||||
.find(Name("a"))
|
||||
.filter_map(|n| n.attr("href"))
|
||||
.for_each(|x| println!("{}", x));
|
||||
|
||||
Ok(())
|
||||
error_chain! {
|
||||
foreign_links {
|
||||
ReqError(reqwest::Error);
|
||||
IoError(std::io::Error);
|
||||
}
|
||||
}
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()> {
|
||||
let res = reqwest::get("https://www.rust-lang.org/en-US/")
|
||||
.await?
|
||||
.text()
|
||||
.await?;
|
||||
|
||||
Document::from(res.as_str())
|
||||
.find(Name("a"))
|
||||
.filter_map(|n| n.attr("href"))
|
||||
.for_each(|x| println!("{}", x));
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
[`attr`]: https://docs.rs/select/*/select/node/struct.Node.html#method.attr
|
||||
|
|
|
|||
|
|
@ -9,55 +9,50 @@ look for all entries of internal and external links with
|
|||
MediaWiki link syntax is described [here][MediaWiki link syntax].
|
||||
|
||||
```rust,edition2018,no_run
|
||||
# use error_chain::error_chain;
|
||||
use lazy_static::lazy_static;
|
||||
|
||||
use std::io::Read;
|
||||
use std::collections::HashSet;
|
||||
use std::borrow::Cow;
|
||||
use regex::Regex;
|
||||
use std::borrow::Cow;
|
||||
use std::collections::HashSet;
|
||||
use std::error::Error;
|
||||
|
||||
# error_chain! {
|
||||
# foreign_links {
|
||||
# Io(std::io::Error);
|
||||
# Reqwest(reqwest::Error);
|
||||
# Regex(regex::Error);
|
||||
# }
|
||||
# }
|
||||
#
|
||||
fn extract_links(content: &str) -> Result<HashSet<Cow<str>>> {
|
||||
lazy_static! {
|
||||
static ref WIKI_REGEX: Regex =
|
||||
Regex::new(r"(?x)
|
||||
fn extract_links(content: &str) -> HashSet<Cow<str>> {
|
||||
lazy_static! {
|
||||
static ref WIKI_REGEX: Regex = Regex::new(
|
||||
r"(?x)
|
||||
\[\[(?P<internal>[^\[\]|]*)[^\[\]]*\]\] # internal links
|
||||
|
|
||||
(url=|URL\||\[)(?P<external>http.*?)[ \|}] # external links
|
||||
").unwrap();
|
||||
}
|
||||
"
|
||||
)
|
||||
.unwrap();
|
||||
}
|
||||
|
||||
let links: HashSet<_> = WIKI_REGEX
|
||||
.captures_iter(content)
|
||||
.map(|c| match (c.name("internal"), c.name("external")) {
|
||||
(Some(val), None) => Cow::from(val.as_str().to_lowercase()),
|
||||
(None, Some(val)) => Cow::from(val.as_str()),
|
||||
_ => unreachable!(),
|
||||
})
|
||||
.collect();
|
||||
let links: HashSet<_> = WIKI_REGEX
|
||||
.captures_iter(content)
|
||||
.map(|c| match (c.name("internal"), c.name("external")) {
|
||||
(Some(val), None) => Cow::from(val.as_str().to_lowercase()),
|
||||
(None, Some(val)) => Cow::from(val.as_str()),
|
||||
_ => unreachable!(),
|
||||
})
|
||||
.collect();
|
||||
|
||||
Ok(links)
|
||||
links
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let mut content = String::new();
|
||||
reqwest::get(
|
||||
"https://en.wikipedia.org/w/index.php?title=Rust_(programming_language)&action=raw",
|
||||
)?
|
||||
.read_to_string(&mut content)?;
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<(), Box<dyn Error>> {
|
||||
let content = reqwest::get(
|
||||
"https://en.wikipedia.org/w/index.php?title=Rust_(programming_language)&action=raw",
|
||||
)
|
||||
.await?
|
||||
.text()
|
||||
.await?;
|
||||
|
||||
println!("{:#?}", extract_links(&content)?);
|
||||
println!("{:#?}", extract_links(content.as_str()));
|
||||
|
||||
Ok(())
|
||||
Ok(())
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
[`Cow`]: https://doc.rust-lang.org/std/borrow/enum.Cow.html
|
||||
|
|
|
|||
Loading…
Reference in a new issue