servo: Merge #3387 - Implement atob and btoa methods for worker (from prasoon2211:base64_methods_for_worker)

Source-Repo: https://github.com/servo/servo
Source-Revision: 61642d64b5c06f30fd68961e5ffd21a35dacbc4c

servo/components/script/dom/webidls/WorkerGlobalScope.webidl

@@ -23,7 +23,7 @@ partial interface WorkerGlobalScope { // not obsolete
   readonly attribute WorkerNavigator navigator;
 };
 //WorkerGlobalScope implements WindowTimers;
-//WorkerGlobalScope implements WindowBase64;
+WorkerGlobalScope implements WindowBase64;
 
 // Proprietary
 partial interface WorkerGlobalScope {

servo/components/script/dom/window.rs

@@ -126,6 +126,81 @@ pub struct TimerData {
     pub funval: Traceable<JSVal>,
 }
 
+// http://www.whatwg.org/html/#atob
+pub fn base64_btoa(btoa: DOMString) -> Fallible<DOMString> {
+    let input = btoa.as_slice();
+    // "The btoa() method must throw an InvalidCharacterError exception if
+    //  the method's first argument contains any character whose code point
+    //  is greater than U+00FF."
+    if input.chars().any(|c: char| c > '\u00FF') {
+        Err(InvalidCharacter)
+    } else {
+        // "Otherwise, the user agent must convert that argument to a
+        //  sequence of octets whose nth octet is the eight-bit
+        //  representation of the code point of the nth character of
+        //  the argument,"
+        let octets = input.chars().map(|c: char| c as u8).collect::<Vec<u8>>();
+
+        // "and then must apply the base64 algorithm to that sequence of
+        //  octets, and return the result. [RFC4648]"
+        Ok(octets.as_slice().to_base64(STANDARD))
+    }
+}
+
+// http://www.whatwg.org/html/#atob
+pub fn base64_atob(atob: DOMString) -> Fallible<DOMString> {
+    // "Let input be the string being parsed."
+    let mut input = atob.as_slice();
+
+    // "Remove all space characters from input."
+    // serialize::base64::from_base64 ignores \r and \n,
+    // but it treats the other space characters as
+    // invalid input.
+    fn is_html_space(c: char) -> bool {
+        HTML_SPACE_CHARACTERS.iter().any(|&m| m == c)
+    }
+    let without_spaces = input.chars()
+        .filter(|&c| ! is_html_space(c))
+        .collect::<String>();
+    input = without_spaces.as_slice();
+
+    // "If the length of input divides by 4 leaving no remainder, then:
+    //  if input ends with one or two U+003D EQUALS SIGN (=) characters,
+    //  remove them from input."
+    if input.len() % 4 == 0 {
+        if input.ends_with("==") {
+            input = input.slice_to(input.len() - 2)
+        } else if input.ends_with("=") {
+            input = input.slice_to(input.len() - 1)
+        }
+    }
+
+    // "If the length of input divides by 4 leaving a remainder of 1,
+    //  throw an InvalidCharacterError exception and abort these steps."
+    if input.len() % 4 == 1 {
+        return Err(InvalidCharacter)
+    }
+
+    // "If input contains a character that is not in the following list of
+    //  characters and character ranges, throw an InvalidCharacterError
+    //  exception and abort these steps:
+    //
+    //  U+002B PLUS SIGN (+)
+    //  U+002F SOLIDUS (/)
+    //  Alphanumeric ASCII characters"
+    if input.chars()
+        .find(|&c| !(c == '+' || c == '/' || c.is_alphanumeric()))
+        .is_some() {
+            return Err(InvalidCharacter)
+        }
+
+    match input.from_base64() {
+        Ok(data) => Ok(data.iter().map(|&b| b as char).collect::<String>()),
+        Err(..) => Err(InvalidCharacter)
+    }
+}
+
+
 impl<'a> WindowMethods for JSRef<'a, Window> {
     fn Alert(&self, s: DOMString) {
         // Right now, just print to the console
@@ -273,78 +348,12 @@ impl<'a> WindowMethods for JSRef<'a, Window> {
         }
     }
 
-    // http://www.whatwg.org/html/#atob
     fn Btoa(&self, btoa: DOMString) -> Fallible<DOMString> {
-        let input = btoa.as_slice();
-        // "The btoa() method must throw an InvalidCharacterError exception if
-        //  the method's first argument contains any character whose code point
-        //  is greater than U+00FF."
-        if input.chars().any(|c: char| c > '\u00FF') {
-            Err(InvalidCharacter)
-        } else {
-            // "Otherwise, the user agent must convert that argument to a
-            //  sequence of octets whose nth octet is the eight-bit
-            //  representation of the code point of the nth character of
-            //  the argument,"
-            let octets = input.chars().map(|c: char| c as u8).collect::<Vec<u8>>();
-
-            // "and then must apply the base64 algorithm to that sequence of
-            //  octets, and return the result. [RFC4648]"
-            Ok(octets.as_slice().to_base64(STANDARD))
-        }
+        base64_btoa(btoa)
     }
 
-    // http://www.whatwg.org/html/#atob
     fn Atob(&self, atob: DOMString) -> Fallible<DOMString> {
-        // "Let input be the string being parsed."
-        let mut input = atob.as_slice();
-
-        // "Remove all space characters from input."
-        // serialize::base64::from_base64 ignores \r and \n,
-        // but it treats the other space characters as
-        // invalid input.
-        fn is_html_space(c: char) -> bool {
-            HTML_SPACE_CHARACTERS.iter().any(|&m| m == c)
-        }
-        let without_spaces = input.chars()
-                                  .filter(|&c| ! is_html_space(c))
-                                  .collect::<String>();
-        input = without_spaces.as_slice();
-
-        // "If the length of input divides by 4 leaving no remainder, then:
-        //  if input ends with one or two U+003D EQUALS SIGN (=) characters,
-        //  remove them from input."
-        if input.len() % 4 == 0 {
-            if input.ends_with("==") {
-                input = input.slice_to(input.len() - 2)
-            } else if input.ends_with("=") {
-                input = input.slice_to(input.len() - 1)
-            }
-        }
-
-        // "If the length of input divides by 4 leaving a remainder of 1,
-        //  throw an InvalidCharacterError exception and abort these steps."
-        if input.len() % 4 == 1 {
-            return Err(InvalidCharacter)
-        }
-
-        // "If input contains a character that is not in the following list of
-        //  characters and character ranges, throw an InvalidCharacterError
-        //  exception and abort these steps:
-        //
-        //  U+002B PLUS SIGN (+)
-        //  U+002F SOLIDUS (/)
-        //  Alphanumeric ASCII characters"
-        if input.chars()
-                .find(|&c| !(c == '+' || c == '/' || c.is_alphanumeric()))
-                .is_some() {
-            return Err(InvalidCharacter)
-        }
-
-        match input.from_base64() {
-            Ok(data) => Ok(data.iter().map(|&b| b as char).collect::<String>()),
-            Err(..) => Err(InvalidCharacter)
-        }
+        base64_atob(atob)
     }
 }
 

servo/components/script/dom/workerglobalscope.rs

@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::codegen::Bindings::WorkerGlobalScopeBinding::WorkerGlobalScopeMethods;
-use dom::bindings::error::{ErrorResult, Syntax, Network, FailureUnknown};
+use dom::bindings::error::{ErrorResult, Fallible, Syntax, Network, FailureUnknown};
 use dom::bindings::trace::Untraceable;
 use dom::bindings::global;
 use dom::bindings::js::{JS, JSRef, Temporary, OptionalSettable};
@@ -12,6 +12,7 @@ use dom::console::Console;
 use dom::eventtarget::{EventTarget, WorkerGlobalScopeTypeId};
 use dom::workerlocation::WorkerLocation;
 use dom::workernavigator::WorkerNavigator;
+use dom::window::{base64_atob, base64_btoa};
 use script_task::ScriptChan;
 
 use servo_net::resource_task::{ResourceTask, load_whole_resource};
@@ -137,6 +138,14 @@ impl<'a> WorkerGlobalScopeMethods for JSRef<'a, WorkerGlobalScope> {
         }
         Temporary::new(self.console.get().get_ref().clone())
     }
+
+    fn Btoa(&self, btoa: DOMString) -> Fallible<DOMString> {
+        base64_btoa(btoa)
+    }
+
+    fn Atob(&self, atob: DOMString) -> Fallible<DOMString> {
+        base64_atob(atob)
+    }
 }
 
 impl Reflectable for WorkerGlobalScope {