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Guess image mime type from file extension (fixes #5196) (#5212)

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* Guess image mime type from file extension (fixes #5196)

* Mime check fixes. (#5213)

* Mime check fixes.

* Adding back comment.

---------

Co-authored-by: Dessalines <dessalines@users.noreply.github.com>
This commit is contained in:
Nutomic 2024-11-19 15:48:44 +01:00 committed by GitHub
parent 417e18e819
commit 63ea99d38a
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GPG key ID: B5690EEEBB952194
3 changed files with 33 additions and 7 deletions
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19
Cargo.lock generated
View file

@ -1,6 +1,6 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
version = 4
[[package]]
name = "accept-language"
@ -2515,6 +2515,7 @@ dependencies = [
"lemmy_db_views_moderator",
"lemmy_utils",
"mime",
"mime_guess",
"moka",
"pretty_assertions",
"regex",
@ -3147,6 +3148,16 @@ version = "0.3.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
[[package]]
name = "mime_guess"
version = "2.0.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f7c44f8e672c00fe5308fa235f821cb4198414e1c77935c1ab6948d3fd78550e"
dependencies = [
"mime",
"unicase",
]
[[package]]
name = "minimal-lexical"
version = "0.2.1"
@ -5300,6 +5311,12 @@ version = "1.17.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
[[package]]
name = "unicase"
version = "2.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7e51b68083f157f853b6379db119d1c1be0e6e4dec98101079dec41f6f5cf6df"
[[package]]
name = "unicode-bidi"
version = "0.3.15"

1
crates/api_common/Cargo.toml
View file

@ -64,6 +64,7 @@ actix-web = { workspace = true, optional = true }
enum-map = { workspace = true }
urlencoding = { workspace = true }
mime = { version = "0.3.17", optional = true }
mime_guess = "2.0.5"
webpage = { version = "2.0", default-features = false, features = [
"serde",
], optional = true }

14
crates/api_common/src/request.rs
View file

@ -23,7 +23,6 @@ use lemmy_utils::{
REQWEST_TIMEOUT,
VERSION,
};
use mime::Mime;
use reqwest::{
header::{CONTENT_TYPE, RANGE},
Client,
@ -64,11 +63,20 @@ pub async fn fetch_link_metadata(url: &Url, context: &LemmyContext) -> LemmyResu
.await?
.error_for_status()?;
let content_type: Option<Mime> = response
// In some cases servers send a wrong mime type for images, which prevents thumbnail
// generation. To avoid this we also try to guess the mime type from file extension.
let content_type = mime_guess::from_path(url.path())
.first()
// If you can guess that its an image type, then return that first.
.filter(|guess| guess.type_() == mime::IMAGE)
// Otherwise, get the content type from the headers
.or(
response
.headers()
.get(CONTENT_TYPE)
.and_then(|h| h.to_str().ok())
.and_then(|h| h.parse().ok());
.and_then(|h| h.parse().ok()),
);
let opengraph_data = {
// if the content type is not text/html, we don't need to parse it