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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/apple/http_response_headers_util.h"
#import <Foundation/Foundation.h>
#include "base/check.h"
#include "base/format_macros.h"
#include "base/strings/stringprintf.h"
#include "base/strings/sys_string_conversions.h"
#include "net/http/http_util.h"
namespace {
// String format used to create the http status line from the status code and
// its localized description.
char const kHttpStatusLineFormat[] = "HTTP %" PRIdNS " DummyStatusDescription";
} // anonymous namespace
namespace net {
NSString* FixNSStringIncorrectlyDecodedAsLatin1(NSString* string) {
// Check if the string contains any character above '\u007f'. If not,
// then the "latin1" and "utf-8" representation are identical, and there
// is no need to allocate memory for the conversion.
static NSCharacterSet* non_ascii_characters = [NSCharacterSet
characterSetWithRange:NSMakeRange(0x0080, 0x10ffff - 0x0080)];
NSRange range = [string rangeOfCharacterFromSet:non_ascii_characters];
if (range.location == NSNotFound && range.length == 0)
return string;
// Try to save the string as "latin1". Will fail if it does contains
// characters that falls out of the "latin1" range (i.e. after '\u00ff').
NSData* data = [string dataUsingEncoding:NSISOLatin1StringEncoding
allowLossyConversion:NO];
if (!data)
return string;
// Try to load the saved data as "utf-8". Will fail if the string is
// not encoded in "utf-8". In that case, it was probably not garbled
// and the original string needs to be used. This will be the case for
// strings that are genuinely encoded in "latin1".
NSString* decoded = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
if (!decoded)
return string;
return decoded;
}
scoped_refptr<HttpResponseHeaders> CreateHeadersFromNSHTTPURLResponse(
NSHTTPURLResponse* response) {
DCHECK(response);
// Initialize the header with a generated status line.
scoped_refptr<HttpResponseHeaders> http_headers(new HttpResponseHeaders(
base::StringPrintf(kHttpStatusLineFormat, response.statusCode)));
// Iterate through |response|'s headers and add them to |http_headers|.
[response.allHeaderFields enumerateKeysAndObjectsUsingBlock:^(
NSString* name, NSString* value, BOOL*) {
const std::string header_name = base::SysNSStringToUTF8(name);
if (!HttpUtil::IsValidHeaderName(header_name))
return;
const std::string header_value =
base::SysNSStringToUTF8(FixNSStringIncorrectlyDecodedAsLatin1(value));
if (!HttpUtil::IsValidHeaderValue(header_value))
return;
http_headers->AddHeader(header_name, header_value);
}];
return http_headers;
}
} // namespace net
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