toolkit/actors/NetErrorChild.sys.mjs

   1 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 const lazy = {};
   7
   8 ChromeUtils.defineESModuleGetters(lazy, {
   9   AppInfo: "chrome://remote/content/shared/AppInfo.sys.mjs",
  10 });
  11
  12 import { RemotePageChild } from "resource://gre/actors/RemotePageChild.sys.mjs";
  13
  14 export class NetErrorChild extends RemotePageChild {
  15   actorCreated() {
  16     super.actorCreated();
  17
  18     // If you add a new function, remember to add it to RemotePageAccessManager.sys.mjs
  19     // to allow content-privileged about:neterror or about:certerror to use it.
  20     const exportableFunctions = [
  21       "RPMGetAppBuildID",
  22       "RPMGetInnerMostURI",
  23       "RPMAddToHistogram",
  24       "RPMRecordTelemetryEvent",
  25       "RPMCheckAlternateHostAvailable",
  26       "RPMGetHttpResponseHeader",
  27       "RPMIsTRROnlyFailure",
  28       "RPMIsFirefox",
  29       "RPMIsNativeFallbackFailure",
  30       "RPMOpenPreferences",
  31       "RPMGetTRRSkipReason",
  32       "RPMGetTRRDomain",
  33       "RPMIsSiteSpecificTRRError",
  34       "RPMSetTRRDisabledLoadFlags",
  35       "RPMGetCurrentTRRMode",
  36     ];
  37     this.exportFunctions(exportableFunctions);
  38   }
  39
  40   getFailedCertChain(docShell) {
  41     let securityInfo =
  42       docShell.failedChannel && docShell.failedChannel.securityInfo;
  43     if (!securityInfo) {
  44       return [];
  45     }
  46     return securityInfo.failedCertChain.map(cert => cert.getBase64DERString());
  47   }
  48
  49   handleEvent(aEvent) {
  50     // Documents have a null ownerDocument.
  51     let doc = aEvent.originalTarget.ownerDocument || aEvent.originalTarget;
  52
  53     switch (aEvent.type) {
  54       case "click":
  55         let elem = aEvent.originalTarget;
  56         if (elem.id == "viewCertificate") {
  57           // Call through the superclass to avoid the security check.
  58           this.sendAsyncMessage("Browser:CertExceptionError", {
  59             location: doc.location.href,
  60             elementId: elem.id,
  61             failedCertChain: this.getFailedCertChain(doc.defaultView.docShell),
  62           });
  63         }
  64         break;
  65     }
  66   }
  67
  68   RPMGetInnerMostURI(uriString) {
  69     let uri = Services.io.newURI(uriString);
  70     if (uri instanceof Ci.nsINestedURI) {
  71       uri = uri.QueryInterface(Ci.nsINestedURI).innermostURI;
  72     }
  73
  74     return uri.spec;
  75   }
  76
  77   RPMGetAppBuildID() {
  78     return Services.appinfo.appBuildID;
  79   }
  80
  81   RPMAddToHistogram(histID, bin) {
  82     Services.telemetry.getHistogramById(histID).add(bin);
  83   }
  84
  85   RPMRecordTelemetryEvent(category, event, object, value, extra) {
  86     Services.telemetry.recordEvent(category, event, object, value, extra);
  87   }
  88
  89   RPMCheckAlternateHostAvailable() {
  90     const host = this.contentWindow.location.host.trim();
  91
  92     // Adapted from UrlbarUtils::looksLikeSingleWordHost
  93     // https://searchfox.org/mozilla-central/rev/a26af613a476fafe6c3eba05a81bef63dff3c9f1/browser/components/urlbar/UrlbarUtils.sys.mjs#893
  94     const REGEXP_SINGLE_WORD = /^[^\s@:/?#]+(:\d+)?$/;
  95     if (!REGEXP_SINGLE_WORD.test(host)) {
  96       return;
  97     }
  98
  99     let info = Services.uriFixup.forceHttpFixup(
 100       this.contentWindow.location.href
 101     );
 102
 103     if (!info.fixupCreatedAlternateURI && !info.fixupChangedProtocol) {
 104       return;
 105     }
 106
 107     let { displayHost, displaySpec, pathQueryRef } = info.fixedURI;
 108
 109     if (pathQueryRef.endsWith("/")) {
 110       pathQueryRef = pathQueryRef.slice(0, pathQueryRef.length - 1);
 111     }
 112
 113     let weakDoc = Cu.getWeakReference(this.contentWindow.document);
 114     let onLookupCompleteListener = {
 115       onLookupComplete(request, record, status) {
 116         let doc = weakDoc.get();
 117         if (!doc || !Components.isSuccessCode(status)) {
 118           return;
 119         }
 120
 121         let link = doc.createElement("a");
 122         link.href = displaySpec;
 123         link.setAttribute("data-l10n-name", "website");
 124
 125         let span = doc.createElement("span");
 126         span.appendChild(link);
 127         doc.l10n.setAttributes(span, "neterror-dns-not-found-with-suggestion", {
 128           hostAndPath: displayHost + pathQueryRef,
 129         });
 130
 131         const shortDesc = doc.getElementById("errorShortDesc");
 132         shortDesc.textContent += " ";
 133         shortDesc.appendChild(span);
 134       },
 135     };
 136
 137     Services.uriFixup.checkHost(
 138       info.fixedURI,
 139       onLookupCompleteListener,
 140       this.document.nodePrincipal.originAttributes
 141     );
 142   }
 143
 144   // Get the header from the http response of the failed channel. This function
 145   // is used in the 'about:neterror' page.
 146   RPMGetHttpResponseHeader(responseHeader) {
 147     let channel = this.contentWindow.docShell.failedChannel;
 148     if (!channel) {
 149       return "";
 150     }
 151
 152     let httpChannel = channel.QueryInterface(Ci.nsIHttpChannel);
 153     if (!httpChannel) {
 154       return "";
 155     }
 156
 157     try {
 158       return httpChannel.getResponseHeader(responseHeader);
 159     } catch (e) {}
 160
 161     return "";
 162   }
 163
 164   RPMIsTRROnlyFailure() {
 165     // We will only show this in Firefox because the options may direct users to settings only available on Firefox Desktop
 166     let channel = this.contentWindow?.docShell?.failedChannel?.QueryInterface(
 167       Ci.nsIHttpChannelInternal
 168     );
 169     if (!channel) {
 170       return false;
 171     }
 172     return channel.effectiveTRRMode == Ci.nsIRequest.TRR_ONLY_MODE;
 173   }
 174
 175   RPMIsFirefox() {
 176     return lazy.AppInfo.isFirefox;
 177   }
 178
 179   _getTRRSkipReason() {
 180     let channel = this.contentWindow?.docShell?.failedChannel?.QueryInterface(
 181       Ci.nsIHttpChannelInternal
 182     );
 183     return channel?.trrSkipReason ?? Ci.nsITRRSkipReason.TRR_UNSET;
 184   }
 185
 186   RPMIsNativeFallbackFailure() {
 187     if (!this.contentWindow?.navigator.onLine) {
 188       return false;
 189     }
 190
 191     let skipReason = this._getTRRSkipReason();
 192
 193     if (
 194       Services.dns.currentTrrMode === Ci.nsIDNSService.MODE_TRRFIRST &&
 195       skipReason === Ci.nsITRRSkipReason.TRR_NOT_CONFIRMED
 196     ) {
 197       return true;
 198     }
 199
 200     const warningReasons = new Set([
 201       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_GOOGLE_SAFESEARCH,
 202       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_YOUTUBE_SAFESEARCH,
 203       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_ZSCALER_CANARY,
 204       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_CANARY,
 205       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_MODIFIED_ROOTS,
 206       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_PARENTAL_CONTROLS,
 207       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_THIRD_PARTY_ROOTS,
 208       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_ENTERPRISE_POLICY,
 209       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_VPN,
 210       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_PROXY,
 211       Ci.nsITRRSkipReason.TRR_HEURISTIC_TRIPPED_NRPT,
 212     ]);
 213
 214     return (
 215       Services.dns.currentTrrMode === Ci.nsIDNSService.MODE_NATIVEONLY &&
 216       warningReasons.has(skipReason)
 217     );
 218   }
 219
 220   RPMGetTRRSkipReason() {
 221     let skipReason = this._getTRRSkipReason();
 222     return Services.dns.getTRRSkipReasonName(skipReason);
 223   }
 224
 225   RPMGetTRRDomain() {
 226     return Services.dns.trrDomain;
 227   }
 228
 229   RPMIsSiteSpecificTRRError() {
 230     let skipReason = this._getTRRSkipReason();
 231     switch (skipReason) {
 232       case Ci.nsITRRSkipReason.TRR_NXDOMAIN:
 233       case Ci.nsITRRSkipReason.TRR_RCODE_FAIL:
 234       case Ci.nsITRRSkipReason.TRR_NO_ANSWERS:
 235         return true;
 236     }
 237     return false;
 238   }
 239
 240   RPMSetTRRDisabledLoadFlags() {
 241     this.contentWindow.docShell.browsingContext.defaultLoadFlags |=
 242       Ci.nsIRequest.LOAD_TRR_DISABLED_MODE;
 243   }
 244 }