tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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nsAboutProtocolUtils.h (2009B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 #ifndef nsAboutProtocolUtils_h
      6 #define nsAboutProtocolUtils_h
      7 
      8 #include "mozilla/Try.h"
      9 #include "nsIURI.h"
     10 #include "nsString.h"
     11 #include "nsReadableUtils.h"
     12 #include "nsIAboutModule.h"
     13 #include "nsServiceManagerUtils.h"
     14 #include "prtime.h"
     15 
     16 [[nodiscard]] inline nsresult NS_GetAboutModuleName(nsIURI* aAboutURI,
     17                                                    nsCString& aModule) {
     18  NS_ASSERTION(aAboutURI->SchemeIs("about"),
     19               "should be used only on about: URIs");
     20 
     21  MOZ_TRY(aAboutURI->GetPathQueryRef(aModule));
     22 
     23  int32_t f = aModule.FindCharInSet("#?"_ns);
     24  if (f != kNotFound) {
     25    aModule.Truncate(f);
     26  }
     27 
     28  // convert to lowercase, as all about: modules are lowercase
     29  ToLowerCase(aModule);
     30  return NS_OK;
     31 }
     32 
     33 [[nodiscard]] inline bool NS_IsContentAccessibleAboutURI(nsIURI* aURI) {
     34  MOZ_ASSERT(aURI->SchemeIs("about"), "Should be used only on about: URIs");
     35  nsAutoCString name;
     36  if (NS_WARN_IF(NS_FAILED(NS_GetAboutModuleName(aURI, name)))) {
     37    return true;
     38  }
     39  return name.EqualsLiteral("blank") || name.EqualsLiteral("srcdoc");
     40 }
     41 
     42 inline nsresult NS_GetAboutModule(nsIURI* aAboutURI, nsIAboutModule** aModule) {
     43  MOZ_ASSERT(aAboutURI, "Must have URI");
     44 
     45  nsAutoCString contractID;
     46  MOZ_TRY(NS_GetAboutModuleName(aAboutURI, contractID));
     47 
     48  // look up a handler to deal with "what"
     49  contractID.InsertLiteral(NS_ABOUT_MODULE_CONTRACTID_PREFIX, 0);
     50 
     51  return CallGetService(contractID.get(), aModule);
     52 }
     53 
     54 inline PRTime SecondsToPRTime(uint32_t t_sec) {
     55  return (PRTime)t_sec * PR_USEC_PER_SEC;
     56 }
     57 
     58 inline void PrintTimeString(char* buf, uint32_t bufsize, uint32_t t_sec) {
     59  PRExplodedTime et;
     60  PRTime t_usec = SecondsToPRTime(t_sec);
     61  PR_ExplodeTime(t_usec, PR_LocalTimeParameters, &et);
     62  PR_FormatTime(buf, bufsize, "%Y-%m-%d %H:%M:%S", &et);
     63 }
     64 
     65 #endif