1 files changed, 330 insertions, 0 deletions
diff --git a/externals/breakpad/src/tools/windows/converter_exe/http_download.cc b/externals/breakpad/src/tools/windows/converter_exe/http_download.cc
new file mode 100644
index 0000000000..de8241980b
--- /dev/null
+++ b/externals/breakpad/src/tools/windows/converter_exe/http_download.cc
@@ -0,0 +1,330 @@
+// Copyright 2019 Google LLC
+//
+// 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 LLC 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.
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>  // Must come first
+#endif
+
+#include <assert.h>
+#include <stdio.h>
+#include <Windows.h>
+#include <WinInet.h>
+
+#include <vector>
+
+#include "tools/windows/converter_exe/http_download.h"
+#include "tools/windows/converter_exe/winhttp_client.h"
+#include "tools/windows/converter_exe/wininet_client.h"
+
+namespace crash {
+static const std::vector<char>::size_type kVectorChunkSize = 4096;  // 4 KB
+
+using std::vector;
+
+// Class that atuo closes the contained HttpHandle when the object
+// goes out of scope.
+class AutoHttpHandle {
+ public:
+  AutoHttpHandle() : handle_(NULL) {}
+  explicit AutoHttpHandle(HttpHandle handle) : handle_(handle) {}
+  ~AutoHttpHandle() {
+    if (handle_) {
+      InternetCloseHandle(handle_);
+    }
+  }
+
+  HttpHandle get() { return handle_; }
+  HttpHandle* get_handle_addr () { return &handle_; }
+
+ private:
+  HttpHandle handle_;
+};
+
+// Template class for auto releasing the contained pointer when
+// the object goes out of scope.
+template<typename T>
+class AutoPtr {
+ public:
+  explicit AutoPtr(T* ptr) : ptr_(ptr) {}
+  ~AutoPtr() {
+    if (ptr_) {
+      delete ptr_;
+    }
+  }
+
+  T* get() { return ptr_; }
+  T* operator -> () { return ptr_; }
+
+ private:
+  T* ptr_;
+};
+
+// CheckParameters ensures that the parameters in |parameters| are safe for
+// use in an HTTP URL.  Returns true if they are, false if unsafe characters
+// are present.
+static bool CheckParameters(const map<wstring, wstring>* parameters) {
+  for (map<wstring, wstring>::const_iterator iterator = parameters->begin();
+       iterator != parameters->end();
+       ++iterator) {
+    const wstring& key = iterator->first;
+    if (key.empty()) {
+      // Disallow empty parameter names.
+      return false;
+    }
+    for (unsigned int i = 0; i < key.size(); ++i) {
+      wchar_t c = key[i];
+      if (c < 32 || c == '"' || c == '?' || c == '&' || c > 127) {
+        return false;
+      }
+    }
+
+    const wstring& value = iterator->second;
+    for (unsigned int i = 0; i < value.size(); ++i) {
+      wchar_t c = value[i];
+      if (c < 32 || c == '"' || c == '?' || c == '&' || c > 127) {
+        return false;
+      }
+    }
+  }
+
+  return true;
+}
+
+HttpClient* HTTPDownload::CreateHttpClient(const wchar_t* url) {
+  const TCHAR* kHttpApiPolicyEnvironmentVariable = TEXT("USE_WINHTTP");
+  TCHAR buffer[2] = {0};
+  HttpClient* http_client = NULL;
+
+  if (::GetEnvironmentVariable(kHttpApiPolicyEnvironmentVariable,
+                               buffer,
+                               sizeof(buffer)/sizeof(buffer[0])) > 0) {
+    fprintf(stdout,
+            "Environment variable [%ws] is set, use WinHttp\n",
+            kHttpApiPolicyEnvironmentVariable);
+    http_client = CreateWinHttpClient(url);
+    if (http_client == NULL) {
+      fprintf(stderr, "WinHttpClient not created, Is the protocol HTTPS? "
+                      "Fall back to WinInet API.\n");
+    }
+  } else {
+    fprintf(stderr,
+            "Environment variable [%ws] is NOT set, use WinInet API\n",
+            kHttpApiPolicyEnvironmentVariable);
+  }
+
+  if (http_client == NULL) {
+    return CreateWinInetClient(url);
+  }
+
+  return http_client;
+}
+
+// static
+bool HTTPDownload::Download(const wstring& url,
+                            const map<wstring, wstring>* parameters,
+                            string *content, int *status_code) {
+  assert(content);
+  AutoPtr<HttpClient> http_client(CreateHttpClient(url.c_str()));
+
+  if (!http_client.get()) {
+    fprintf(stderr, "Failed to create any http client.\n");
+    return false;
+  }
+
+  if (status_code) {
+    *status_code = 0;
+  }
+
+  wchar_t scheme[16] = {0};
+  wchar_t host[256] = {0};
+  wchar_t path[256] = {0};
+  int port = 0;
+  if (!http_client->CrackUrl(url.c_str(),
+                             0,
+                             scheme,
+                             sizeof(scheme)/sizeof(scheme[0]),
+                             host,
+                             sizeof(host)/sizeof(host[0]),
+                             path,
+                             sizeof(path)/sizeof(path[0]),
+                             &port)) {
+    fprintf(stderr,
+            "HTTPDownload::Download: InternetCrackUrl: error %lu for %ws\n",
+            GetLastError(), url.c_str());
+    return false;
+  }
+
+  bool secure = false;
+  if (_wcsicmp(scheme, L"https") == 0) {
+    secure = true;
+  } else if (wcscmp(scheme, L"http") != 0) {
+    fprintf(stderr,
+            "HTTPDownload::Download: scheme must be http or https for %ws\n",
+            url.c_str());
+    return false;
+  }
+
+  AutoHttpHandle internet;
+  if (!http_client->Open(NULL,  // user agent
+                         HttpClient::ACCESS_TYPE_PRECONFIG,
+                         NULL,  // proxy name
+                         NULL,  // proxy bypass
+                         internet.get_handle_addr())) {
+    fprintf(stderr,
+            "HTTPDownload::Download: Open: error %lu for %ws\n",
+            GetLastError(), url.c_str());
+    return false;
+  }
+
+  AutoHttpHandle connection;
+  if (!http_client->Connect(internet.get(),
+                            host,
+                            port,
+                            connection.get_handle_addr())) {
+    fprintf(stderr,
+            "HTTPDownload::Download: InternetConnect: error %lu for %ws\n",
+            GetLastError(), url.c_str());
+    return false;
+  }
+
+  wstring request_string = path;
+  if (parameters) {
+    // TODO(mmentovai): escape bad characters in parameters instead of
+    // forbidding them.
+    if (!CheckParameters(parameters)) {
+      fprintf(stderr,
+              "HTTPDownload::Download: invalid characters in parameters\n");
+      return false;
+    }
+
+    bool added_parameter = false;
+    for (map<wstring, wstring>::const_iterator iterator = parameters->begin();
+         iterator != parameters->end();
+         ++iterator) {
+      request_string.append(added_parameter ? L"&" : L"?");
+      request_string.append(iterator->first);
+      request_string.append(L"=");
+      request_string.append(iterator->second);
+      added_parameter = true;
+    }
+  }
+
+  AutoHttpHandle request;
+  if (!http_client->OpenRequest(connection.get(),
+                                L"GET",
+                                request_string.c_str(),
+                                NULL,    // version
+                                NULL,    // referer
+                                secure,
+                                request.get_handle_addr())) {
+    fprintf(stderr,
+            "HttpClient::OpenRequest: error %lu for %ws, request: %ws\n",
+            GetLastError(), url.c_str(), request_string.c_str());
+    return false;
+  }
+
+  if (!http_client->SendRequest(request.get(), NULL, 0)) {
+    fprintf(stderr,
+            "HttpClient::SendRequest: error %lu for %ws\n",
+            GetLastError(), url.c_str());
+    return false;
+  }
+
+  if (!http_client->ReceiveResponse(request.get())) {
+    fprintf(stderr,
+            "HttpClient::ReceiveResponse: error %lu for %ws\n",
+            GetLastError(), url.c_str());
+    return false;
+  }
+
+  int http_status = 0;
+  if (!http_client->GetHttpStatusCode(request.get(), &http_status)) {
+    fprintf(stderr,
+            "HttpClient::GetHttpStatusCode: error %lu for %ws\n",
+            GetLastError(), url.c_str());
+    return false;
+  }
+  if (http_status != 200) {
+    fprintf(stderr,
+            "HTTPDownload::Download: HTTP status code %d for %ws\n",
+            http_status, url.c_str());
+    return false;
+  }
+
+  DWORD content_length = 0;
+  vector<char>::size_type buffer_size = 0;
+  http_client->GetContentLength(request.get(), &content_length);
+  if (content_length == HttpClient::kUnknownContentLength) {
+    buffer_size = kVectorChunkSize;
+  } else {
+    buffer_size = content_length;
+  }
+
+  if (content_length != 0) {
+    vector<char> response_buffer = vector<char>(buffer_size+1);
+    DWORD size_read;
+    DWORD total_read = 0;
+    bool read_result;
+    do {
+      if (content_length == HttpClient::kUnknownContentLength
+          && buffer_size == total_read) {
+        // The content length wasn't specified in the response header, so we
+        // have to keep growing the buffer until we're done reading.
+        buffer_size += kVectorChunkSize;
+        response_buffer.resize(buffer_size);
+      }
+      read_result = !!http_client->ReadData(
+          request.get(),
+          &response_buffer[total_read],
+          static_cast<DWORD>(buffer_size) - total_read,
+          &size_read);
+      total_read += size_read;
+    } while (read_result && (size_read != 0));
+
+    if (!read_result) {
+      fprintf(stderr,
+              "HttpClient::ReadData: error %lu for %ws\n",
+              GetLastError(),
+              url.c_str());
+      return false;
+    } else if (size_read != 0) {
+      fprintf(stderr,
+              "HttpClient::ReadData: error %lu/%lu for %ws\n",
+              total_read,
+              content_length,
+              url.c_str());
+      return false;
+    }
+    content->assign(&response_buffer[0], total_read);
+  } else {
+    content->clear();
+  }
+  return true;
+}
+
+}  // namespace crash