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// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <assert.h>
// Disable exception handler warnings.
#pragma warning(disable:4530)
#include <fstream>
#include "common/windows/string_utils-inl.h"
#include "common/windows/http_upload.h"
namespace google_breakpad {
using std::ifstream;
using std::ios;
static const wchar_t kUserAgent[] = L"Breakpad/1.0 (Windows)";
// Helper class which closes an internet handle when it goes away
class HTTPUpload::AutoInternetHandle {
public:
explicit AutoInternetHandle(HINTERNET handle) : handle_(handle) {}
~AutoInternetHandle() {
if (handle_) {
InternetCloseHandle(handle_);
}
}
HINTERNET get() { return handle_; }
private:
HINTERNET handle_;
};
// static
bool HTTPUpload::SendRequest(const wstring &url,
const map<wstring, wstring> &parameters,
const map<wstring, wstring> &files,
int *timeout,
wstring *response_body,
int *response_code) {
if (response_code) {
*response_code = 0;
}
// TODO(bryner): support non-ASCII parameter names
if (!CheckParameters(parameters)) {
return false;
}
// Break up the URL and make sure we can handle it
wchar_t scheme[16], host[256], path[256];
URL_COMPONENTS components;
memset(&components, 0, sizeof(components));
components.dwStructSize = sizeof(components);
components.lpszScheme = scheme;
components.dwSchemeLength = sizeof(scheme) / sizeof(scheme[0]);
components.lpszHostName = host;
components.dwHostNameLength = sizeof(host) / sizeof(host[0]);
components.lpszUrlPath = path;
components.dwUrlPathLength = sizeof(path) / sizeof(path[0]);
if (!InternetCrackUrl(url.c_str(), static_cast<DWORD>(url.size()),
0, &components)) {
return false;
}
bool secure = false;
if (wcscmp(scheme, L"https") == 0) {
secure = true;
} else if (wcscmp(scheme, L"http") != 0) {
return false;
}
AutoInternetHandle internet(InternetOpen(kUserAgent,
INTERNET_OPEN_TYPE_PRECONFIG,
NULL, // proxy name
NULL, // proxy bypass
0)); // flags
if (!internet.get()) {
return false;
}
AutoInternetHandle connection(InternetConnect(internet.get(),
host,
components.nPort,
NULL, // user name
NULL, // password
INTERNET_SERVICE_HTTP,
0, // flags
NULL)); // context
if (!connection.get()) {
return false;
}
DWORD http_open_flags = secure ? INTERNET_FLAG_SECURE : 0;
http_open_flags |= INTERNET_FLAG_NO_COOKIES;
AutoInternetHandle request(HttpOpenRequest(connection.get(),
L"POST",
path,
NULL, // version
NULL, // referer
NULL, // agent type
http_open_flags,
NULL)); // context
if (!request.get()) {
return false;
}
wstring boundary = GenerateMultipartBoundary();
wstring content_type_header = GenerateRequestHeader(boundary);
HttpAddRequestHeaders(request.get(),
content_type_header.c_str(),
static_cast<DWORD>(-1),
HTTP_ADDREQ_FLAG_ADD);
string request_body;
if (!GenerateRequestBody(parameters, files, boundary, &request_body)) {
return false;
}
if (timeout) {
if (!InternetSetOption(request.get(),
INTERNET_OPTION_SEND_TIMEOUT,
timeout,
sizeof(*timeout))) {
fwprintf(stderr, L"Could not unset send timeout, continuing...\n");
}
if (!InternetSetOption(request.get(),
INTERNET_OPTION_RECEIVE_TIMEOUT,
timeout,
sizeof(*timeout))) {
fwprintf(stderr, L"Could not unset receive timeout, continuing...\n");
}
}
if (!HttpSendRequest(request.get(), NULL, 0,
const_cast<char *>(request_body.data()),
static_cast<DWORD>(request_body.size()))) {
return false;
}
// The server indicates a successful upload with HTTP status 200.
wchar_t http_status[4];
DWORD http_status_size = sizeof(http_status);
if (!HttpQueryInfo(request.get(), HTTP_QUERY_STATUS_CODE,
static_cast<LPVOID>(&http_status), &http_status_size,
0)) {
return false;
}
int http_response = wcstol(http_status, NULL, 10);
if (response_code) {
*response_code = http_response;
}
bool result = (http_response == 200);
if (result) {
result = ReadResponse(request.get(), response_body);
}
return result;
}
// static
bool HTTPUpload::ReadResponse(HINTERNET request, wstring *response) {
bool has_content_length_header = false;
wchar_t content_length[32];
DWORD content_length_size = sizeof(content_length);
DWORD claimed_size = 0;
string response_body;
if (HttpQueryInfo(request, HTTP_QUERY_CONTENT_LENGTH,
static_cast<LPVOID>(&content_length),
&content_length_size, 0)) {
has_content_length_header = true;
claimed_size = wcstol(content_length, NULL, 10);
response_body.reserve(claimed_size);
}
DWORD bytes_available;
DWORD total_read = 0;
BOOL return_code;
while (((return_code = InternetQueryDataAvailable(request, &bytes_available,
0, 0)) != 0) && bytes_available > 0) {
vector<char> response_buffer(bytes_available);
DWORD size_read;
return_code = InternetReadFile(request,
&response_buffer[0],
bytes_available, &size_read);
if (return_code && size_read > 0) {
total_read += size_read;
response_body.append(&response_buffer[0], size_read);
} else {
break;
}
}
bool succeeded = return_code && (!has_content_length_header ||
(total_read == claimed_size));
if (succeeded && response) {
*response = UTF8ToWide(response_body);
}
return succeeded;
}
// static
wstring HTTPUpload::GenerateMultipartBoundary() {
// The boundary has 27 '-' characters followed by 16 hex digits
static const wchar_t kBoundaryPrefix[] = L"---------------------------";
static const int kBoundaryLength = 27 + 16 + 1;
// Generate some random numbers to fill out the boundary
int r0 = rand();
int r1 = rand();
wchar_t temp[kBoundaryLength];
swprintf(temp, kBoundaryLength, L"%s%08X%08X", kBoundaryPrefix, r0, r1);
// remove when VC++7.1 is no longer supported
temp[kBoundaryLength - 1] = L'\0';
return wstring(temp);
}
// static
wstring HTTPUpload::GenerateRequestHeader(const wstring &boundary) {
wstring header = L"Content-Type: multipart/form-data; boundary=";
header += boundary;
return header;
}
// static
bool HTTPUpload::GenerateRequestBody(const map<wstring, wstring> &parameters,
const map<wstring, wstring> &files,
const wstring &boundary,
string *request_body) {
string boundary_str = WideToUTF8(boundary);
if (boundary_str.empty()) {
return false;
}
request_body->clear();
// Append each of the parameter pairs as a form-data part
for (map<wstring, wstring>::const_iterator pos = parameters.begin();
pos != parameters.end(); ++pos) {
request_body->append("--" + boundary_str + "\r\n");
request_body->append("Content-Disposition: form-data; name=\"" +
WideToUTF8(pos->first) + "\"\r\n\r\n" +
WideToUTF8(pos->second) + "\r\n");
}
for (map<wstring, wstring>::const_iterator pos = files.begin();
pos != files.end(); ++pos) {
vector<char> contents;
if (!GetFileContents(pos->second, &contents)) {
return false;
}
// Now append the upload files as a binary (octet-stream) part
string filename_utf8 = WideToUTF8(pos->second);
if (filename_utf8.empty()) {
return false;
}
string file_part_name_utf8 = WideToUTF8(pos->first);
if (file_part_name_utf8.empty()) {
return false;
}
request_body->append("--" + boundary_str + "\r\n");
request_body->append("Content-Disposition: form-data; "
"name=\"" + file_part_name_utf8 + "\"; "
"filename=\"" + filename_utf8 + "\"\r\n");
request_body->append("Content-Type: application/octet-stream\r\n");
request_body->append("\r\n");
if (!contents.empty()) {
request_body->append(&(contents[0]), contents.size());
}
request_body->append("\r\n");
}
request_body->append("--" + boundary_str + "--\r\n");
return true;
}
// static
bool HTTPUpload::GetFileContents(const wstring &filename,
vector<char> *contents) {
bool rv = false;
// The "open" method on pre-MSVC8 ifstream implementations doesn't accept a
// wchar_t* filename, so use _wfopen directly in that case. For VC8 and
// later, _wfopen has been deprecated in favor of _wfopen_s, which does
// not exist in earlier versions, so let the ifstream open the file itself.
// GCC doesn't support wide file name and opening on FILE* requires ugly
// hacks, so fallback to multi byte file.
#ifdef _MSC_VER
ifstream file;
file.open(filename.c_str(), ios::binary);
#else // GCC
ifstream file(WideToMBCP(filename, CP_ACP).c_str(), ios::binary);
#endif // _MSC_VER >= 1400
if (file.is_open()) {
file.seekg(0, ios::end);
std::streamoff length = file.tellg();
// Check for loss of data when converting lenght from std::streamoff into
// std::vector<char>::size_type
std::vector<char>::size_type vector_size =
static_cast<std::vector<char>::size_type>(length);
if (static_cast<std::streamoff>(vector_size) == length) {
contents->resize(vector_size);
if (length != 0) {
file.seekg(0, ios::beg);
file.read(&((*contents)[0]), length);
}
rv = true;
}
file.close();
}
return rv;
}
// static
wstring HTTPUpload::UTF8ToWide(const string &utf8) {
if (utf8.length() == 0) {
return wstring();
}
// compute the length of the buffer we'll need
int charcount = MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), -1, NULL, 0);
if (charcount == 0) {
return wstring();
}
// convert
wchar_t* buf = new wchar_t[charcount];
MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), -1, buf, charcount);
wstring result(buf);
delete[] buf;
return result;
}
// static
string HTTPUpload::WideToMBCP(const wstring &wide, unsigned int cp) {
if (wide.length() == 0) {
return string();
}
// compute the length of the buffer we'll need
int charcount = WideCharToMultiByte(cp, 0, wide.c_str(), -1,
NULL, 0, NULL, NULL);
if (charcount == 0) {
return string();
}
// convert
char *buf = new char[charcount];
WideCharToMultiByte(cp, 0, wide.c_str(), -1, buf, charcount,
NULL, NULL);
string result(buf);
delete[] buf;
return result;
}
// static
bool HTTPUpload::CheckParameters(const map<wstring, wstring> &parameters) {
for (map<wstring, wstring>::const_iterator pos = parameters.begin();
pos != parameters.end(); ++pos) {
const wstring &str = pos->first;
if (str.size() == 0) {
return false; // disallow empty parameter names
}
for (unsigned int i = 0; i < str.size(); ++i) {
wchar_t c = str[i];
if (c < 32 || c == '"' || c > 127) {
return false;
}
}
}
return true;
}
} // namespace google_breakpad