1 files changed, 0 insertions, 145 deletions
diff --git a/background/ResponseProcessor.mjs b/background/ResponseProcessor.mjs
deleted file mode 100644
index 85c2655..0000000
--- a/background/ResponseProcessor.mjs
+++ /dev/null
@@ -1,145 +0,0 @@
-/**
-* GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
-*
-* Copyright (C) 2018 Giorgio Maone <giorgio@maone.net>
-*
-* This file is part of GNU LibreJS.
-*
-* GNU LibreJS is free software: you can redistribute it and/or modify
-* it under the terms of the GNU General Public License as published by
-* the Free Software Foundation, either version 3 of the License, or
-* (at your option) any later version.
-*
-* GNU LibreJS is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-* GNU General Public License for more details.
-*
-* You should have received a copy of the GNU General Public License
-* along with GNU LibreJS.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/**
-  An abstraction layer over the StreamFilter API, allowing its clients to process
-  only the "interesting" HTML and script requests and leaving the other alone
-*/
-
-import ResponseMetaData from './ResponseMetaData.mjs';
-import browser from '/common/browser.mjs';
-
-let listeners = new WeakMap();
-let webRequestEvent = browser.webRequest.onHeadersReceived;
-
-class ResponseProcessor {
-
-  static install(handler, types = ["main_frame", "sub_frame"]) {
-    if (listeners.has(handler)) return false;
-    let listener =
-      async request => await new ResponseTextFilter(request).process(handler);
-    listeners.set(handler, listener);
-    webRequestEvent.addListener(
-  		listener,
-  		{urls: ["<all_urls>"], types},
-  		["blocking", "responseHeaders"]
-  	);
-    return true;
-  }
-
-  static uninstall(handler) {
-    let listener = listeners.get(handler);
-    if (listener) {
-      webRequestEvent.removeListener(listener);
-    }
-  }
-}
-
-Object.assign(ResponseProcessor, {
-  // control flow values to be returned by handler.pre() callbacks
-	ACCEPT: {},
-	REJECT: {cancel: true},
-	CONTINUE: null
-});
-
-class ResponseTextFilter {
-  constructor(request) {
-    this.request = request;
-    let {type, statusCode} = request;
-    let md = this.metaData = new ResponseMetaData(request);
-    this.canProcess = // we want to process html documents and scripts only
-      (statusCode < 300 || statusCode >= 400) && // skip redirections
-      !md.disposition && // skip forced downloads
-      (type === "script" || /\bhtml\b/i.test(md.contentType));
-  }
-
-  async process(handler) {
-    if (!this.canProcess) return ResponseProcessor.ACCEPT;
-    let {metaData, request} = this;
-    let response = {request, metaData}; // we keep it around allowing callbacks to store state
-    if (typeof handler.pre === "function") {
-      let res = await handler.pre(response);
-      if (res) return res;
-      if (handler.post) handler = handler.post;
-      if (typeof handler !== "function") return ResponseProcessor.ACCEPT;
-    }
-
-    return ResponseProcessor.ACCEPT;  
-
-    let {requestId, responseHeaders} = request;
-    let filter = browser.webRequest.filterResponseData(requestId);
-    let buffer = [];
-
-    filter.ondata = event => {
-      buffer.push(event.data);
-    };
-
-    filter.onstop = async event => {
-      // concatenate chunks
-      let size = buffer.reduce((sum, chunk, n) => sum + chunk.byteLength, 0)
-      let allBytes = new Uint8Array(size);
-      let pos = 0;
-      for (let chunk of buffer) {
-        allBytes.set(new Uint8Array(chunk), pos);
-        pos += chunk.byteLength;
-      }
-      buffer = null; // allow garbage collection
-      if (allBytes.indexOf(0) !== -1) {
-        console.debug("Warning: zeroes in bytestream, probable cached encoding mismatch.", request);
-        if (request.type === "script") {
-          console.debug("It's a script, trying to refetch it.");
-          response.text = await (await fetch(request.url, {cache: "reload", credentials: "include"})).text();
-        } else {
-          console.debug("It's a %s, trying to decode it as UTF-16.", request.type);
-          response.text = new TextDecoder("utf-16be").decode(allBytes, {stream: true});
-        }
-      } else {
-        response.text = metaData.decode(allBytes);
-      }
-      let editedText = null;
-      try {
-        editedText = await handler(response);
-      } catch(e) {
-        console.error(e);
-      }
-      if (editedText !== null) {
-        // we changed the content, let's re-encode
-        let encoded = new TextEncoder().encode(editedText);
-        // pre-pending the UTF-8 BOM will force the charset per HTML 5 specs
-        allBytes = new Uint8Array(encoded.byteLength + 3);
-        allBytes.set(ResponseMetaData.UTF8BOM, 0); // UTF-8 BOM
-        allBytes.set(encoded, 3);
-      }
-      filter.write(allBytes);
-      filter.close();
-    }
-
-    return ResponseProcessor.ACCEPT;
-  }
-}
-
-/* The following was originally in Storage.js */
-function url_item(url) {
-    let queryPos = url.indexOf("?");
-    return queryPos === -1 ? url : url.substring(0, queryPos);
-}
-
-export {ResponseProcessor, url_item};