AddOriginMapping()

shell/url_resolver.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "shell/url_resolver.h"
 
 #include "base/base_paths.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "shell/filename_util.h"
+#include "shell/switches.h"
 #include "url/url_util.h"
 
 namespace mojo {
 namespace shell {
 
 URLResolver::URLResolver() {
   // Needed to treat first component of mojo URLs as host, not path.
   url::AddStandardScheme("mojo");
 }
 
 URLResolver::~URLResolver() {
 }
 
-void URLResolver::AddURLMapping(const GURL& url, const GURL& resolved_url) {
-  url_map_[url] = resolved_url;
+// static
+std::vector<URLResolver::OriginMapping> URLResolver::GetOriginMappings(
+    const std::vector<std::string> args) {
+  std::vector<OriginMapping> origin_mappings;
+  const std::string kArgsForSwitches[] = {
+      "-" + std::string(switches::kMapOrigin) + "=",

[Aaron Boodman, 2015/02/13 22:44:15]

Can't we just pick one? Why have choices when we can not have choices?

[DaveMoore, 2015/02/13 23:07:10]

It's consistent with the rest of the switches. base::CommandLine does this as
well.

[blundell, 2015/02/16 08:32:34]

nit: is it not possible to allow a space instead of an "=" here as well?

+      "--" + std::string(switches::kMapOrigin) + "=",
+  };
+  for (auto& arg : args) {
+    for (size_t i = 0; i < arraysize(kArgsForSwitches); i++) {
+      const std::string& argsfor_switch = kArgsForSwitches[i];
+      if (arg.compare(0, argsfor_switch.size(), argsfor_switch) == 0) {
+        std::string value =
+            arg.substr(argsfor_switch.size(), std::string::npos);
+        size_t delim = value.find('=');
+        if (delim <= 0 || delim >= value.size())
+          continue;
+        origin_mappings.push_back(
+            OriginMapping(value.substr(0, delim),
+                          value.substr(delim + 1, std::string::npos)));
+      }
+    }
+  }
+  return origin_mappings;
 }
 
-GURL URLResolver::ApplyURLMappings(const GURL& url) const {
+void URLResolver::AddURLMapping(const GURL& url, const GURL& mapped_url) {
+  url_map_[url] = mapped_url;
+}
+
+void URLResolver::AddOriginMapping(const GURL& origin, const GURL& base_url) {
+  if (!origin.is_valid() || !base_url.is_valid() ||
+      origin != origin.GetOrigin()) {
+    // Disallow invalid mappings.
+    LOG(ERROR) << "Invalid origin for mapping: " << origin;
+    return;
+  }
+  // Force both origin and base_url to have trailing slashes.
+  origin_map_[origin] = AddTrailingSlashIfNeeded(base_url);
+}
+
+GURL URLResolver::ApplyMappings(const GURL& url) const {
   GURL mapped_url(url);
   for (;;) {
-    const auto& it = url_map_.find(mapped_url);
-    if (it == url_map_.end())
+    const auto& url_it = url_map_.find(mapped_url);
+    if (url_it != url_map_.end()) {
+      mapped_url = url_it->second;
+      continue;
+    }
+
+    GURL origin = mapped_url.GetOrigin();
+    const auto& origin_it = origin_map_.find(origin);
+    if (origin_it == origin_map_.end())
       break;
-    mapped_url = it->second;
+    mapped_url = GURL(origin_it->second.spec() +
+                      mapped_url.spec().substr(origin.spec().length()));
   }
+
   return mapped_url;
 }
 
 void URLResolver::SetMojoBaseURL(const GURL& mojo_base_url) {
   DCHECK(mojo_base_url.is_valid());
   // Force a trailing slash on the base_url to simplify resolving
   // relative files and URLs below.
   mojo_base_url_ = AddTrailingSlashIfNeeded(mojo_base_url);
 }
 
 GURL URLResolver::ResolveMojoURL(const GURL& mojo_url) const {
   if (mojo_url.scheme() != "mojo") {
     // The mapping has produced some sort of non-mojo: URL - file:, http:, etc.
     return mojo_url;
   } else {
     // It's still a mojo: URL, use the default mapping scheme.
     std::string suffix = "";
     if (mojo_url.has_query()) {
       suffix = "?" + mojo_url.query();
     }
     std::string lib = mojo_url.host() + ".mojo" + suffix;
     return mojo_base_url_.Resolve(lib);
   }
 }
 
 }  // namespace shell
 }  // namespace mojo