Fetches pdf data in the worker

src/api.js

@@ -18,52 +18,21 @@
  * @return {Promise} A promise that is resolved with {PDFDocumentProxy} object.
  */
 PDFJS.getDocument = function getDocument(source) {
-  var url, data, headers, password, parameters = {};
   if (typeof source === 'string') {
-    url = source;
+    source = { url: source };
   } else if (isArrayBuffer(source)) {
-    data = source;
-  } else if (typeof source === 'object') {
-    url = source.url;
-    data = source.data;
-    headers = source.httpHeaders;
-    password = source.password;
-    parameters.password = password || null;
-
-    if (!url && !data)
-      error('Invalid parameter array, need either .data or .url');
-  } else {
+    source = { data: source };
+  } else if (typeof source !== 'object') {
     error('Invalid parameter in getDocument, need either Uint8Array, ' +
           'string or a parameter object');
   }
 
+  if (!source.url && !source.data)
+    error('Invalid parameter array, need either .data or .url');
+
   var promise = new PDFJS.Promise();
   var transport = new WorkerTransport(promise);
-  if (data) {
-    // assuming the data is array, instantiating directly from it
-    transport.sendData(data, parameters);
-  } else if (url) {
-    // fetch url
-    PDFJS.getPdf(
-      {
-        url: url,
-        progress: function getPDFProgress(evt) {
-          if (evt.lengthComputable)
-            promise.progress({
-              loaded: evt.loaded,
-              total: evt.total
-            });
-        },
-        error: function getPDFError(e) {
-          promise.reject('Unexpected server response of ' +
-            e.target.status + '.');
-        },
-        headers: headers
-      },
-      function getPDFLoad(data) {
-        transport.sendData(data, parameters);
-      });
-  }
+  transport.fetchDocument(source);
 
   return promise;
 };
@@ -511,6 +480,34 @@ var WorkerTransport = (function WorkerTransportClosure() {
         this.workerReadyPromise.resolve(pdfDocument);
       }, this);
 
+      messageHandler.on('FetchDoc', function transportFetchDoc(data) {
+        var url = data.url;
+        var headers = data.httpHeaders;
+        var password = data.password;
+
+        var promise = this.workerReadyPromise;
+        var transport = this;
+        PDFJS.getPdf(
+          {
+            url: url,
+            progress: function getPDFProgress(evt) {
+              if (evt.lengthComputable)
+                promise.progress({
+                  loaded: evt.loaded,
+                  total: evt.total
+                });
+            },
+            error: function getPDFError(e) {
+              promise.reject('Unexpected server response of ' +
+                e.target.status + '.');
+            },
+            headers: headers
+          },
+          function getPDFLoad(data) {
+            transport.sendData(data);
+          });
+      }, this);
+
       messageHandler.on('NeedPassword', function transportPassword(data) {
         this.workerReadyPromise.reject(data.exception.message, data.exception);
       }, this);
@@ -577,6 +574,17 @@ var WorkerTransport = (function WorkerTransportClosure() {
         }
       }, this);
 
+      messageHandler.on('DocProgress', function transportDocProgress(data) {
+        this.workerReadyPromise.progress({
+          loaded: data.loaded,
+          total: data.total
+        });
+      }, this);
+
+      messageHandler.on('DocError', function transportDocError(data) {
+        this.workerReadyPromise.reject(data.message);
+      }, this);
+
       messageHandler.on('PageError', function transportError(data) {
         var page = this.pageCache[data.pageNum - 1];
         if (page.displayReadyPromise)
@@ -621,11 +629,15 @@ var WorkerTransport = (function WorkerTransportClosure() {
       });
     },
 
-    sendData: function WorkerTransport_sendData(data, params) {
-      this.messageHandler.send('GetDocRequest', {data: data, params: params});
+    sendData: function WorkerTransport_sendData(data) {
+      this.messageHandler.send('GetDocRequest', {data: data});
     },
 
-    getData: function WorkerTransport_sendData(promise) {
+    fetchDocument: function WorkerTransport_fetchDocument(source) {
+      this.messageHandler.send('FetchDocRequest', {source: source});
+    },
+
+    getData: function WorkerTransport_getData(promise) {
       this.messageHandler.send('GetData', null, function(data) {
         promise.resolve(data);
       });

src/core.js

@@ -45,8 +45,8 @@ function getPdf(arg, callback) {
   }
 
   xhr.mozResponseType = xhr.responseType = 'arraybuffer';
-  var protocol = params.url.indexOf(':') < 0 ? window.location.protocol :
-    params.url.substring(0, params.url.indexOf(':') + 1);
+
+  var protocol = params.url.substring(0, params.url.indexOf(':') + 1);
   xhr.expected = (protocol === 'http:' || protocol === 'https:') ? 200 : 0;
 
   if ('progress' in params)

src/util.js

@@ -57,6 +57,24 @@ function assert(cond, msg) {
     error(msg);
 }
 
+function combineUrl(baseUrl, url) {
+  if (url.indexOf(':') >= 0)
+    return url;
+  if (url.charAt(0) == '/') {
+    // absolute path
+    var i = baseUrl.indexOf('://');
+    i = baseUrl.indexOf('/', i + 3);
+    return baseUrl.substring(0, i) + url;
+  } else {
+    // relative path
+    var i = baseUrl.lastIndexOf('#');
+    i = baseUrl.lastIndexOf('?', i < 0 ? baseUrl.length : i);
+    i = baseUrl.lastIndexOf('/', i < 0 ? baseUrl.length : i);
+    return baseUrl.substring(0, i + 1) + url;
+  }
+}
+PDFJS.combineUrl = combineUrl;
+
 // In a well-formed PDF, |cond| holds.  If it doesn't, subsequent
 // behavior is undefined.
 function assertWellFormed(cond, msg) {

src/worker.js

@@ -3,6 +3,8 @@
 
 'use strict';
 
+var useMainThreadToDownload = false;
+
 function MessageHandler(name, comObj) {
   this.name = name;
   this.comObj = comObj;
@@ -83,16 +85,12 @@ MessageHandler.prototype = {
 var WorkerMessageHandler = {
   setup: function wphSetup(handler) {
     var pdfModel = null;
+    var pdfModelSource = null;
 
-    handler.on('test', function wphSetupTest(data) {
-      handler.send('test', data instanceof Uint8Array);
-    });
-
-    handler.on('GetDocRequest', function wphSetupDoc(data) {
+    function loadDocument(pdfData) {
       // Create only the model of the PDFDoc, which is enough for
       // processing the content of the pdf.
-      var pdfData = data.data;
-      var pdfPassword = data.params.password;
+      var pdfPassword = pdfModelSource.password;
       try {
         pdfModel = new PDFDocument(new Stream(pdfData), pdfPassword);
       } catch (e) {
@@ -122,6 +120,55 @@ var WorkerMessageHandler = {
         encrypted: !!pdfModel.xref.encrypt
       };
       handler.send('GetDoc', {pdfInfo: doc});
+    }
+
+    handler.on('test', function wphSetupTest(data) {
+      handler.send('test', data instanceof Uint8Array);
+    });
+
+    handler.on('GetDocRequest', function wphSetupDoc(data) {
+      var pdfData = data.data;
+      loadDocument(pdfData);
+    });
+
+    handler.on('FetchDocRequest', function wphSetupFetchDoc(data) {
+      var source = data.source;
+      pdfModelSource = source;
+
+      if (source.data) {
+        // the data is array, instantiating directly from it
+        loadDocument(source.data);
+        return;
+      }
+
+      if (useMainThreadToDownload) {
+        // fallback to main thread to download PDF
+        handler.send('FetchDoc', {
+          url: source.url,
+          httpHeaders: source.httpHeaders
+        });
+      }
+
+      PDFJS.getPdf(
+        {
+          url: source.url,
+          progress: function getPDFProgress(evt) {
+            if (evt.lengthComputable) {
+              handler.send('DocProgress', {
+                loaded: evt.loaded,
+                total: evt.total
+              });
+            }
+          },
+          error: function getPDFError(e) {
+            handler.send('DocError', 'Unexpected server response of ' +
+                         e.target.status + '.');
+          },
+          headers: source.httpHeaders
+        },
+        function getPDFLoad(data) {
+          loadDocument(data);
+        });
     });
 
     handler.on('GetPageRequest', function wphSetupGetPage(data) {

test/driver.js

@@ -86,6 +86,10 @@ function exceptionToString(e) {
   return e.message + ('stack' in e ? ' at ' + e.stack.split('\n')[0] : '');
 }
 
+function expandUrl(url) {
+  return combineUrl(window.location.href, url);
+}
+
 function nextTask() {
   cleanup();
 
@@ -98,7 +102,7 @@ function nextTask() {
 
   log('Loading file "' + task.file + '"\n');
 
-  getPdf(task.file, function nextTaskGetPdf(data) {
+  getPdf(expandUrl(task.file), function nextTaskGetPdf(data) {
     var failure;
     function continuation() {
       task.pageNum = task.firstPage || 1;

web/viewer.js

@@ -26,6 +26,10 @@ function getFileName(url) {
   return url.substring(url.lastIndexOf('/', end) + 1, end);
 }
 
+function expandUrl(url) {
+  return PDFJS.combineUrl(window.location.href, url);
+}
+
 var Cache = function cacheCache(size) {
   var data = [];
   this.push = function cachePush(view) {
@@ -376,7 +380,7 @@ var PDFView = {
     if (typeof url === 'string') { // URL
       this.url = url;
       document.title = decodeURIComponent(getFileName(url)) || url;
-      parameters.url = url;
+      parameters.url = expandUrl(url);
     } else if (url && 'byteLength' in url) { // ArrayBuffer
       parameters.data = url;
     }