1 files changed, 116 insertions, 0 deletions
diff --git a/src/scripts/matcher.js b/src/scripts/matcher.js
new file mode 100644
index 0000000..19cd49d
--- /dev/null
+++ b/src/scripts/matcher.js
@@ -0,0 +1,116 @@
+'use strict';
+
+const schemeSet = {
+  all : 1,
+  http: 2,
+  https: 4
+};
+// Shortcuts so we dont perform i18n lookups for every non-match
+const FOR_ALL = {originalPattern: chrome.i18n.getMessage('forAll')}
+const NOMATCH_TEXT = chrome.i18n.getMessage('noMatch');
+const NONE_TEXT = chrome.i18n.getMessage('none');
+const NOMATCH_COLOR = '#D3D3D3';
+const WHITE = chrome.i18n.getMessage('white');
+const BLACK = chrome.i18n.getMessage('black');
+
+function findProxyMatch(url, activeSettings) {
+  // note: we've already thrown out inactive settings and inactive patterns in background.js.
+  // we're not iterating over them
+  
+  if (activeSettings.mode === 'patterns') {
+    // Unfortunately, since Firefox 57 and some releases afterwards, we were unable
+    // to get anything of the URL except scheme, port, and host (because of Fx's PAC
+    // implementation). Now we have access to rest of URL, like pre-57, but users
+    // have written their patterns not anticipating that. Need to do more research
+    // before using other parts of URL. For now, we ignore the other parts.
+    const parsedUrl = new URL(url);
+    const scheme = parsedUrl.protocol.substring(0, parsedUrl.protocol.length-1); // strip the colon
+    const hostPort = parsedUrl.host; // This includes port if one is specified
+
+    for (const proxy of activeSettings.proxySettings) {
+      
+      // Check black patterns first
+      const blackMatch = proxy.blackPatterns.find(item => 
+        (item.protocols === schemeSet.all || item.protocols === schemeSet[scheme]) &&
+          item.pattern.test(hostPort));
+
+      if (blackMatch) {
+        sendToMatchedLog(url, proxy, Utils.getProxyTitle(proxy), blackMatch, BLACK);
+        continue; // if blacklist matched, continue to the next proxy
+      }
+
+      const whiteMatch = proxy.whitePatterns.find(item =>
+        (item.protocols === schemeSet.all || item.protocols === schemeSet[scheme]) &&
+          item.pattern.test(hostPort));
+      
+      if (whiteMatch) {
+  			// found a whitelist match, end here
+        const title = Utils.getProxyTitle(proxy);
+        Utils.updateIcon('images/icon.svg', proxy.color, title, false, title, false);
+        sendToMatchedLog(url, proxy, title, whiteMatch, WHITE);
+        return prepareSetting(proxy);
+  		}
+    }
+    // no white matches in any settings
+    sendToUnmatchedLog(url);
+    Utils.updateIcon('images/gray.svg', null, NOMATCH_TEXT, false, NOMATCH_TEXT, false);
+    return {type: 'direct'};
+  }
+  else if (activeSettings.mode === 'disabled') {
+    // Generally we won't get to this block because our proxy handler is turned off in this mode.
+    // We will get here at startup and also if there is a race condition between removing our listener
+    // (when switching to disabled mode) and handaling requests.
+    return {type: 'direct'};    
+  }
+  else {
+    // Fixed mode -- use 1 proxy for all URLs
+    const p = activeSettings.proxySettings[0];
+    const title = Utils.getProxyTitle(p);
+    Utils.updateIcon('images/icon.svg', p.color, title, false, title, false);
+    sendToMatchedLog(url, p, title, FOR_ALL);
+    return prepareSetting(p);
+  }
+}
+
+const typeSet = {
+  1: 'http',    // PROXY_TYPE_HTTP
+  2: 'https',   // PROXY_TYPE_HTTPS
+  3: 'socks',   // PROXY_TYPE_SOCKS5
+  4: 'socks4',  // PROXY_TYPE_SOCKS4
+  5: 'direct'   // PROXY_TYPE_NONE
+};
+
+function prepareSetting(proxy) {
+  const ret = {
+    type: typeSet[proxy.type] || typeSet[5], // If 'direct', all other properties of this object are ignored.
+    host: proxy.address, 
+    port: proxy.port
+  };
+  proxy.username && (ret.username = proxy.username);
+  proxy.password && (ret.password = proxy.password);
+  proxy.proxyDNS && (ret.proxyDNS = proxy.proxyDNS); // Only useful for SOCKS
+  //if ((proxy.type === PROXY_TYPE_HTTP || proxy.type === PROXY_TYPE_HTTPS) && proxy.username && proxy.password) {
+    // Using wireshark, I do not see this header being sent, contrary to
+    // https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/proxy/ProxyInfo
+    //ret.proxyAuthorizationHeader = 'Basic ' + btoa(proxy.username + ":" + proxy.password);
+  //}
+  return ret;
+}
+
+function sendToMatchedLog(url, proxy, title, matchedPattern, whiteBlack) {
+  // log only the data that is needed for display
+  logger && logger.active && logger.addMatched({
+    url,
+    title,
+    color: proxy.color,
+    address: proxy.address,
+    // Log should display whatever user typed, not our processed version of the pattern
+    matchedPattern: matchedPattern.originalPattern,
+    whiteBlack,
+    timestamp: Date.now()
+  });
+}
+
+function sendToUnmatchedLog(url) {
+  logger && logger.active && logger.addUnmatched({url, timestamp: Date.now()});
+}