Revert of Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/runner/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 "mojo/runner/url_resolver.h"
+
+#include "base/base_paths.h"
+#include "base/logging.h"
+#include "base/strings/utf_string_conversions.h"
+#include "mojo/runner/switches.h"
+#include "mojo/shell/query_util.h"
+#include "mojo/util/filename_util.h"
+#include "url/url_util.h"
+
+namespace mojo {
+namespace runner {
+
+URLResolver::URLResolver() {
+  // Needed to treat first component of mojo URLs as host, not path.
+  url::AddStandardScheme("mojo", url::SCHEME_WITHOUT_AUTHORITY);
+}
+
+URLResolver::~URLResolver() {
+}
+
+// static
+std::vector<URLResolver::OriginMapping> URLResolver::GetOriginMappings(
+    const base::CommandLine::StringVector& args) {
+  std::vector<OriginMapping> origin_mappings;
+  const std::string kArgsForSwitches[] = {
+      "-" + std::string(switches::kMapOrigin) + "=",
+      "--" + std::string(switches::kMapOrigin) + "=",
+  };
+  for (auto& arg : args) {
+    for (size_t i = 0; i < arraysize(kArgsForSwitches); i++) {
+      const std::string& argsfor_switch = kArgsForSwitches[i];
+      std::string arg_string;
+#if defined(OS_WIN)
+      arg_string = base::UTF16ToUTF8(arg);
+#else
+      arg_string = arg;
+#endif
+      if (arg_string.compare(0, argsfor_switch.size(), argsfor_switch) == 0) {
+        std::string value =
+            arg_string.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;
+}
+
+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] = util::AddTrailingSlashIfNeeded(base_url);
+}
+
+GURL URLResolver::ApplyMappings(const GURL& url) const {
+  std::string query;
+  GURL mapped_url = shell::GetBaseURLAndQuery(url, &query);
+  for (;;) {
+    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 = GURL(origin_it->second.spec() +
+                      mapped_url.spec().substr(origin.spec().length()));
+  }
+
+  if (query.length())
+    mapped_url = GURL(mapped_url.spec() + query);
+  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_ = util::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;
+  }
+
+  // It's still a mojo: URL, use the default mapping scheme.
+  std::string query;
+  GURL base_url = shell::GetBaseURLAndQuery(mojo_url, &query);
+  const std::string host = base_url.host();
+  return mojo_base_url_.Resolve(host + "/" + host + ".mojo" + query);
+}
+
+}  // namespace runner
+}  // namespace mojo