Add an option to fetch and parse href="data:image"

Some sites are using base64 encoded inline images for favicons.
This will try to match those with some sane checks and return that.
These icons will have lower prio then the icons with a normal URL.

Cargo.lock

@@ -89,6 +89,7 @@ dependencies = [
  "chashmap 2.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "data-encoding 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "data-url 0.1.0 (git+https://github.com/servo/rust-url?rev=7f1bd6ce1c2fde599a757302a843a60e714c5f72)",
  "derive_more 0.99.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "diesel 1.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "diesel_migrations 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -355,6 +356,14 @@ name = "data-encoding"
 version = "2.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "data-url"
+version = "0.1.0"
+source = "git+https://github.com/servo/rust-url?rev=7f1bd6ce1c2fde599a757302a843a60e714c5f72#7f1bd6ce1c2fde599a757302a843a60e714c5f72"
+dependencies = [
+ "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "derive_more"
 version = "0.99.2"
@@ -925,7 +934,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-normalization 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-normalization 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -935,7 +944,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-normalization 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-normalization 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1281,7 +1290,7 @@ dependencies = [
  "openssl-probe 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-sys 0.9.52 (registry+https://github.com/rust-lang/crates.io-index)",
  "schannel 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "security-framework 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "security-framework 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "security-framework-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2067,7 +2076,7 @@ dependencies = [
 
 [[package]]
 name = "security-framework"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "core-foundation 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2189,6 +2198,11 @@ dependencies = [
  "maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "smallvec"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "soup"
 version = "0.4.1"
@@ -2584,10 +2598,10 @@ dependencies = [
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.9"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2850,6 +2864,7 @@ dependencies = [
 "checksum crypto-mac 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dba62c86c26dcba13c278afcaac0c7452486fe604a2668a0dfa4e0edc98d8a9e"
 "checksum crypto-mac 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4434400df11d95d556bac068ddfedd482915eb18fe8bea89bc80b6e4b1c179e5"
 "checksum data-encoding 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f4f47ca1860a761136924ddd2422ba77b2ea54fe8cc75b9040804a0d9d32ad97"
+"checksum data-url 0.1.0 (git+https://github.com/servo/rust-url?rev=7f1bd6ce1c2fde599a757302a843a60e714c5f72)" = "<none>"
 "checksum derive_more 0.99.2 (registry+https://github.com/rust-lang/crates.io-index)" = "2159be042979966de68315bce7034bb000c775f22e3e834e1c52ff78f041cae8"
 "checksum devise 0.3.0 (git+https://github.com/SergioBenitez/Devise.git?rev=e58b3ac9a)" = "<none>"
 "checksum devise_codegen 0.3.0 (git+https://github.com/SergioBenitez/Devise.git?rev=e58b3ac9a)" = "<none>"
@@ -3034,7 +3049,7 @@ dependencies = [
 "checksum scheduled-thread-pool 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bd07742e081ff6c077f5f6b283f12f32b9e7cc765b316160d66289b74546fbb3"
 "checksum scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b42e15e59b18a828bbf5c58ea01debb36b9b096346de35d941dcb89009f24a0d"
 "checksum sct 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2f5adf8fbd58e1b1b52699dc8bed2630faecb6d8c7bee77d009d6bbe4af569b9"
-"checksum security-framework 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "301c862a6d0ee78f124c5e1710205965fc5c553100dcda6d98f13ef87a763f04"
+"checksum security-framework 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8ef2429d7cefe5fd28bd1d2ed41c944547d4ff84776f5935b456da44593a16df"
 "checksum security-framework-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e31493fc37615debb8c5090a7aeb4a9730bc61e77ab10b9af59f1a202284f895"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
@@ -3048,6 +3063,7 @@ dependencies = [
 "checksum siphasher 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0b8de496cf83d4ed58b6be86c3a275b8602f6ffe98d3024a869e124147a9a3ac"
 "checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 "checksum smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "f7b0758c52e15a8b5e3691eae6cc559f08eee9406e548a4477ba4e67770a82b6"
+"checksum smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ecf3b85f68e8abaa7555aa5abdb1153079387e60b718283d732f03897fcfc86"
 "checksum soup 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "16eb6b0678654a57009598ed84610f2afa5fadb22f3815e9f23dc5eab1056031"
 "checksum spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
@@ -3091,7 +3107,7 @@ dependencies = [
 "checksum unicase 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7f4765f83163b74f957c797ad9253caf97f103fb064d3999aea9568d09fc8a33"
 "checksum unicase 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
 "checksum unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
-"checksum unicode-normalization 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "09c8070a9942f5e7cfccd93f490fdebd230ee3c3c9f107cb25bad5351ef671cf"
+"checksum unicode-normalization 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "f0d98d53dfd9509a7c7f36fa8857b8f1fb699edbddd7dc2fb688db2ae5d0b2c1"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum untrusted 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "55cd1f4b4e96b46aeb8d4855db4a7a9bd96eeeb5c6a1ab54593328761642ce2f"

Cargo.toml

@@ -105,6 +105,7 @@ handlebars = "2.0.2"
 # For favicon extraction from main website
 soup = "0.4.1"
 regex = "1.3.1"
+data-url = "0.1.0"
 
 # Required for SSL support for PostgreSQL
 openssl = { version = "0.10.25", optional = true }
@@ -123,3 +124,6 @@ rocket_contrib = { git = 'https://github.com/SergioBenitez/Rocket', rev = 'b95b6
 # Use git version for timeout fix #706
 lettre = { git = 'https://github.com/lettre/lettre', rev = '24d694db3be017d82b1cdc8bf9da601420b31bb0' }
 lettre_email = { git = 'https://github.com/lettre/lettre', rev = '24d694db3be017d82b1cdc8bf9da601420b31bb0' }
+
+# For favicon extraction from main website
+data-url = { git = 'https://github.com/servo/rust-url', package="data-url", rev = '7f1bd6ce1c2fde599a757302a843a60e714c5f72' }

src/api/icons.rs

@@ -238,7 +238,7 @@ fn get_icon_url(domain: &str) -> Result<(Vec<Icon>, String), Error> {
         let favicons = soup
             .tag("link")
             .attr("rel", Regex::new(r"icon$|apple.*icon")?) // Only use icon rels
-            .attr("href", Regex::new(r"(?i)\w+\.(jpg|jpeg|png|ico)(\?.*)?$")?) // Only allow specific extensions
+            .attr("href", Regex::new(r"(?i)\w+\.(jpg|jpeg|png|ico)(\?.*)?$|^data:image.*base64")?) // Only allow specific extensions
             .find_all();
 
         // Loop through all the found icons and determine it's priority
@@ -373,7 +373,23 @@ fn download_icon(domain: &str) -> Result<Vec<u8>, Error> {
 
     let mut buffer = Vec::new();
 
+    use data_url::DataUrl;
+
     for icon in iconlist.iter().take(5) {
+        if icon.href.starts_with("data:image") {
+            let datauri = DataUrl::process(&icon.href).unwrap();
+            // Check if we are able to decode the data uri
+            match datauri.decode_to_vec() {
+                Ok((body, _fragment)) => {
+                    // Also check if the size is atleast 67 bytes, which seems to be the smallest png i could create
+                    if body.len() >= 67 {
+                        buffer = body;
+                        break;
+                    }
+                }
+                _ => warn!("data uri is invalid")
+            };
+        } else {
             match get_page_with_cookies(&icon.href, &cookie_str) {
                 Ok(mut res) => {
                     info!("Downloaded icon from {}", icon.href);
@@ -383,6 +399,7 @@ fn download_icon(domain: &str) -> Result<Vec<u8>, Error> {
                 Err(_) => info!("Download failed for {}", icon.href),
             };
         }
+    }
 
     if buffer.is_empty() {
         err!("Empty response")