sandboxed-api/oss-internship-2020/curl/examples/example4.cc
Christian Blichmann 75bbd0e1c1 Internal change
Only externally visible changes should be a few changed includes as well as
some formatting changes.

PiperOrigin-RevId: 353226662
Change-Id: Iebf5be13774efcbd94c5d5a17b9b27e47275b229
2021-01-22 06:01:34 -08:00

136 lines
4.1 KiB
C++

// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Sandboxed version of multi-poll.c
// HTTP GET request with polling
#include <cstdlib>
#include "../sandbox.h" // NOLINT(build/include)
#include "curl_sapi.sapi.h" // NOLINT(build/include)
#include "sandboxed_api/util/flag.h"
namespace {
absl::Status Example4() {
// Initialize sandbox2 and sapi
curl::CurlSapiSandbox sandbox;
SAPI_RETURN_IF_ERROR(sandbox.Init());
curl::CurlApi api(&sandbox);
// Number of running handles
sapi::v::Int still_running(1);
int curl_code;
// Initialize curl (CURL_GLOBAL_DEFAULT = 3)
SAPI_ASSIGN_OR_RETURN(curl_code, api.curl_global_init(3l));
if (curl_code != 0) {
return absl::UnavailableError("curl_global_init failed: " + curl_code);
}
// Initialize http_handle
curl::CURL* curl_handle;
SAPI_ASSIGN_OR_RETURN(curl_handle, api.curl_easy_init());
sapi::v::RemotePtr http_handle(curl_handle);
if (!curl_handle) {
return absl::UnavailableError("curl_easy_init failed: curl is NULL");
}
// Specify URL to get
sapi::v::ConstCStr url("http://example.com");
SAPI_ASSIGN_OR_RETURN(
curl_code, api.curl_easy_setopt_ptr(&http_handle, curl::CURLOPT_URL,
url.PtrBefore()));
if (curl_code != 0) {
return absl::UnavailableError("curl_easy_setopt_ptr failed: " + curl_code);
}
// Initialize multi_handle
curl::CURLM* curlm_handle;
SAPI_ASSIGN_OR_RETURN(curlm_handle, api.curl_multi_init());
sapi::v::RemotePtr multi_handle(curlm_handle);
if (!curlm_handle) {
return absl::UnavailableError(
"curl_multi_init failed: multi_handle is NULL");
}
// Add http_handle to the multi stack
SAPI_ASSIGN_OR_RETURN(curl_code,
api.curl_multi_add_handle(&multi_handle, &http_handle));
if (curl_code != 0) {
return absl::UnavailableError("curl_multi_add_handle failed: " + curl_code);
}
while (still_running.GetValue()) {
sapi::v::Int numfds(0);
// Perform the request
SAPI_ASSIGN_OR_RETURN(
curl_code,
api.curl_multi_perform(&multi_handle, still_running.PtrBoth()));
if (curl_code != 0) {
return absl::UnavailableError("curl_mutli_perform failed: " + curl_code);
}
if (still_running.GetValue()) {
// Wait for an event or timeout
sapi::v::NullPtr null_ptr;
SAPI_ASSIGN_OR_RETURN(
curl_code, api.curl_multi_poll_sapi(&multi_handle, &null_ptr, 0, 1000,
numfds.PtrBoth()));
if (curl_code != 0) {
return absl::UnavailableError("curl_multi_poll_sapi failed: " +
curl_code);
}
}
}
// Remove http_handle from the multi stack
SAPI_ASSIGN_OR_RETURN(
curl_code, api.curl_multi_remove_handle(&multi_handle, &http_handle));
if (curl_code != 0) {
return absl::UnavailableError("curl_multi_remove_handle failed: " +
curl_code);
}
// Cleanup http_handle
SAPI_RETURN_IF_ERROR(api.curl_easy_cleanup(&http_handle));
// Cleanup multi_handle
SAPI_ASSIGN_OR_RETURN(curl_code, api.curl_multi_cleanup(&multi_handle));
if (curl_code != 0) {
return absl::UnavailableError("curl_multi_cleanup failed: " + curl_code);
}
// Cleanup curl
SAPI_RETURN_IF_ERROR(api.curl_global_cleanup());
return absl::OkStatus();
}
} // namespace
int main(int argc, char* argv[]) {
gflags::ParseCommandLineFlags(&argc, &argv, true);
google::InitGoogleLogging(argv[0]);
if (absl::Status status = Example4(); !status.ok()) {
LOG(ERROR) << "Example4 failed: " << status.ToString();
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}