netwerk/protocol/about/nsAboutProtocolUtils.h

   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