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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/no_state_prefetch/common/no_state_prefetch_utils.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "extensions/buildflags/buildflags.h"
#include "url/gurl.h"
#include "url/url_constants.h"
#if BUILDFLAG(ENABLE_EXTENSIONS)
// GN doesn't understand conditional includes, so we need nogncheck here.
#include "extensions/common/constants.h" // nogncheck
#endif
namespace prerender {
namespace {
// Valid HTTP methods for NoStatePrefetch.
const char* const kValidHttpMethods[] = {
"GET",
"HEAD",
};
} // namespace
const char kFollowOnlyWhenPrerenderShown[] = "follow-only-when-prerender-shown";
bool DoesURLHaveValidScheme(const GURL& url) {
return (url.SchemeIsHTTPOrHTTPS() ||
#if BUILDFLAG(ENABLE_EXTENSIONS)
url.SchemeIs(extensions::kExtensionScheme) ||
#endif
url.SchemeIs(url::kDataScheme));
}
bool DoesSubresourceURLHaveValidScheme(const GURL& url) {
return DoesURLHaveValidScheme(url) || url == url::kAboutBlankURL;
}
bool IsValidHttpMethod(const std::string& method) {
// |method| has been canonicalized to upper case at this point so we can just
// compare them.
DCHECK_EQ(method, base::ToUpperASCII(method));
for (auto* valid_method : kValidHttpMethods) {
if (method == valid_method) {
return true;
}
}
return false;
}
std::string ComposeHistogramName(const std::string& prefix_type,
const std::string& name) {
if (prefix_type.empty()) {
return std::string("Prerender.") + name;
}
return std::string("Prerender.") + prefix_type + std::string("_") + name;
}
} // namespace prerender
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