diff --git a/Cargo.lock b/Cargo.lock
index c23be283b8..0778faa5b1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -149,6 +149,25 @@ name = "block"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "bson"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chrono 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hostname 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "linked-hash-map 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "md5 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "try_from 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "bstr"
 version = "0.2.6"
@@ -1214,6 +1233,15 @@ name = "hex"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "hostname"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winutil 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "http"
 version = "0.1.18"
@@ -1510,6 +1538,11 @@ name = "matches"
 version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "md5"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "memchr"
 version = "2.2.1"
@@ -1650,6 +1683,7 @@ dependencies = [
  "ansi_term 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "app_dirs 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "battery 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bson 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byte-unit 3.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2562,6 +2596,7 @@ name = "serde_json"
 version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2900,6 +2935,11 @@ dependencies = [
  "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "try_from"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "typenum"
 version = "1.10.0"
@@ -3186,6 +3226,14 @@ dependencies = [
  "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "winutil"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "x11"
 version = "2.18.1"
@@ -3254,6 +3302,7 @@ dependencies = [
 "checksum bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3d155346769a6855b86399e9bc3814ab343cd3d62c7e985113d46a0ec3c281fd"
 "checksum blake2b_simd 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "461f4b879a8eb70c1debf7d0788a9a5ff15f1ea9d25925fea264ef4258bed6b2"
 "checksum block 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
+"checksum bson 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8984b7b33b1f8ac97468df3cefa76c7035abb0786473aa2a437dea0c72855702"
 "checksum bstr 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "e0a692f1c740e7e821ca71a22cf99b9b2322dfa94d10f71443befb1797b3946a"
 "checksum bumpalo 2.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2cd43d82f27d68911e6ee11ee791fb248f138f5d69424dc02e098d4f152b0b05"
 "checksum byte-unit 3.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90139954ec9776c4832d44f212e558ccdacbe915a881bf3de3a1a487fa8d1e87"
@@ -3364,6 +3413,7 @@ dependencies = [
 "checksum heim-runtime 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b3304dc68b138eb6e9b6c79785dd911306a4bca66757a88373cb034a4dfe3a4d"
 "checksum heim-virt 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "6f68f73f66e6f00404d7b8ed97b458778f6ccafe1ecd65af797ec36f2003bf90"
 "checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
+"checksum hostname 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "21ceb46a83a85e824ef93669c8b390009623863b5c195d1ba747292c0c72f94e"
 "checksum http 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)" = "372bcb56f939e449117fb0869c2e8fd8753a8223d92a172c6e808cf123a5b6e4"
 "checksum humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ca7e5f2e110db35f93b837c81797f3714500b81d517bf20c431b16d3ca4f114"
 "checksum ident_case 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
@@ -3400,6 +3450,7 @@ dependencies = [
 "checksum mach 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b823e83b2affd8f40a9ee8c29dbc56404c1e34cd2710921f2801e2cf29527afa"
 "checksum malloc_buf 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "62bb907fe88d54d8d9ce32a3cceab4218ed2f6b7d35617cafe9adf84e43919cb"
 "checksum matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
+"checksum md5 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "79c56d6a0b07f9e19282511c83fc5b086364cbae4ba8c7d5f190c3d9b0425a48"
 "checksum memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "88579771288728879b57485cc7d6b07d648c9f0141eb955f8ab7f9d45394468e"
 "checksum memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0f9dc261e2b62d7a622bf416ea3c5245cdd5d9a7fcc428c0d06804dfce1775b3"
 "checksum memoffset 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ce6075db033bbbb7ee5a0bbd3a3186bbae616f57fb001c485c7ff77955f8177f"
@@ -3548,6 +3599,7 @@ dependencies = [
 "checksum tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "5090db468dad16e1a7a54c8c67280c5e4b544f3d3e018f0b913b400261f85926"
 "checksum toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "758664fc71a3a69038656bee8b6be6477d2a6c315a6b81f7081f591bffa4111f"
 "checksum toml 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c7aabe75941d914b72bf3e5d3932ed92ce0664d49d8432305a8b547c37227724"
+"checksum try_from 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "923a7ee3e97dbfe8685261beb4511cc9620a1252405d02693d43169729570111"
 "checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
 "checksum unicase 2.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a84e5511b2a947f3ae965dcb29b13b7b1691b6e7332cf5dbc1744138d5acb7f6"
 "checksum unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
@@ -3585,6 +3637,7 @@ dependencies = [
 "checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 "checksum wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "561ed901ae465d6185fa7864d63fbd5720d0ef718366c9a4dc83cf6170d7e9ba"
+"checksum winutil 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7daf138b6b14196e3830a588acf1e86966c694d3e8fb026fb105b8b5dca07e6e"
 "checksum x11 2.18.1 (registry+https://github.com/rust-lang/crates.io-index)" = "39697e3123f715483d311b5826e254b6f3cfebdd83cf7ef3358f579c3d68e235"
 "checksum x11-clipboard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "89bd49c06c9eb5d98e6ba6536cf64ac9f7ee3a009b2f53996d405b3944f6bcea"
 "checksum xcb 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "5e917a3f24142e9ff8be2414e36c649d47d6cc2ba81f16201cdef96e533e02de"
diff --git a/src/commands/open.rs b/src/commands/open.rs
index d499d6c73d..ffdf0bd68e 100644
--- a/src/commands/open.rs
+++ b/src/commands/open.rs
@@ -51,17 +51,18 @@ fn run(call_info: &CallInfo, shell_manager: &ShellManager) -> Result<OutputStrea
 
     let stream = async_stream_block! {
 
-    //FIXME: unwraps
-    let (file_extension, contents, contents_tag, span_source) =
-        fetch(&full_path, &path_str, path_span).await.unwrap();
+        //FIXME: unwraps
 
-    let file_extension = if call_info.args.has("raw") {
-        None
-    } else {
-        // If the extension could not be determined via mimetype, try to use the path
-        // extension. Some file types do not declare their mimetypes (such as bson files).
-        file_extension.or(path_str.split('.').last().map(String::from))
-    };
+        let (file_extension, contents, contents_tag, span_source) =
+            fetch(&full_path, &path_str, path_span).await.unwrap();
+
+        let file_extension = if has_raw {
+            None
+        } else {
+            // If the extension could not be determined via mimetype, try to use the path
+            // extension. Some file types do not declare their mimetypes (such as bson files).
+            file_extension.or(path_str.split('.').last().map(String::from))
+        };
 
 
         if let Some(uuid) = contents_tag.origin {
@@ -72,24 +73,9 @@ fn run(call_info: &CallInfo, shell_manager: &ShellManager) -> Result<OutputStrea
             ));
         }
 
-    match contents {
-        Value::Primitive(Primitive::String(string)) => {
-            let value = parse_string_as_value(file_extension, string, contents_tag, call_info.name_span)?;
-
-            match value {
-                Tagged {
-                    item: Value::List(list),
-                    ..
-                } => {
-                    for elem in list {
-                        stream.push_back(ReturnSuccess::value(elem));
-                    }
-                }
-                x => stream.push_back(ReturnSuccess::value(x)),
-            }
-        }
-        Value::Binary(binary) => {
-            let value = parse_binary_as_value(file_extension, binary, contents_tag, call_info.name_span)?;
+        match contents {
+            Value::Primitive(Primitive::String(string)) => {
+                let value = parse_string_as_value(file_extension, string, contents_tag, name_span).unwrap();
 
                 match value {
                     Tagged {
@@ -103,7 +89,21 @@ fn run(call_info: &CallInfo, shell_manager: &ShellManager) -> Result<OutputStrea
                     x => yield ReturnSuccess::value(x),
                 }
             }
+            Value::Binary(binary) => {
+                let value = parse_binary_as_value(file_extension, binary, contents_tag, name_span).unwrap();
 
+                match value {
+                    Tagged {
+                        item: Value::List(list),
+                        ..
+                    } => {
+                        for elem in list {
+                            yield ReturnSuccess::value(elem);
+                        }
+                    }
+                    x => yield ReturnSuccess::value(x),
+                }
+            }
             other => yield ReturnSuccess::value(other.tagged(contents_tag)),
         };
     };