mirror of
https://github.com/google/sandboxed-api.git
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d1e8ad94a8
- Update sandbox policy (bring back inclusion of `/lib` to enable glibc resolver - Better error handling using new `curl_util` library Signed-off-by: Christian Blichmann <cblichmann@google.com>
118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Sandboxed version of getinmemory.c
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// HTTP GET request using callbacks
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#include <cstdlib>
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#include "../curl_util.h" // NOLINT(build/include)
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#include "../sandbox.h" // NOLINT(build/include)
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#include "absl/strings/str_cat.h"
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#include "sandboxed_api/util/status_macros.h"
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namespace {
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absl::Status Example2() {
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// Initialize sandbox2 and sapi
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curl::CurlSapiSandbox sandbox;
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SAPI_RETURN_IF_ERROR(sandbox.Init());
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curl::CurlApi api(&sandbox);
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// Generate pointer to WriteMemoryCallback function
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void* function_ptr;
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SAPI_RETURN_IF_ERROR(
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sandbox.rpc_channel()->Symbol("WriteToMemory", &function_ptr));
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sapi::v::RemotePtr write_to_memory(function_ptr);
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// Initialize the curl session
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curl::CURL* curl_handle;
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SAPI_ASSIGN_OR_RETURN(curl_handle, api.curl_easy_init());
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sapi::v::RemotePtr curl(curl_handle);
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if (!curl_handle) {
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return absl::UnavailableError("curl_easy_init failed: Invalid curl handle");
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}
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int curl_code;
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// Specify URL to get
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sapi::v::ConstCStr url("http://example.com");
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SAPI_ASSIGN_OR_RETURN(
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curl_code,
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api.curl_easy_setopt_ptr(&curl, curl::CURLOPT_URL, url.PtrBefore()));
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if (curl_code != 0) {
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return absl::UnavailableError(absl::StrCat(
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"curl_easy_setopt_ptr failed: ", curl::StrError(&api, curl_code)));
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}
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// Set WriteMemoryCallback as the write function
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SAPI_ASSIGN_OR_RETURN(
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curl_code, api.curl_easy_setopt_ptr(&curl, curl::CURLOPT_WRITEFUNCTION,
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&write_to_memory));
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if (curl_code != 0) {
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return absl::UnavailableError(absl::StrCat(
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"curl_easy_setopt_ptr failed: ", curl::StrError(&api, curl_code)));
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}
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// Pass 'chunk' struct to the callback function
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sapi::v::LenVal chunk(0);
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SAPI_ASSIGN_OR_RETURN(curl_code,
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api.curl_easy_setopt_ptr(&curl, curl::CURLOPT_WRITEDATA,
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chunk.PtrBoth()));
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if (curl_code != 0) {
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return absl::UnavailableError(absl::StrCat(
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"curl_easy_setopt_ptr failed: ", curl::StrError(&api, curl_code)));
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}
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// Set a user agent
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sapi::v::ConstCStr user_agent("libcurl-agent/1.0");
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SAPI_ASSIGN_OR_RETURN(curl_code,
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api.curl_easy_setopt_ptr(&curl, curl::CURLOPT_USERAGENT,
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user_agent.PtrBefore()));
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if (curl_code != 0) {
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return absl::UnavailableError(absl::StrCat(
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"curl_easy_setopt_ptr failed: ", curl::StrError(&api, curl_code)));
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}
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// Perform the request
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SAPI_ASSIGN_OR_RETURN(curl_code, api.curl_easy_perform(&curl));
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if (curl_code != 0) {
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return absl::UnavailableError(absl::StrCat(
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"curl_easy_perform failed: ", curl::StrError(&api, curl_code)));
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}
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// Retrieve memory size
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SAPI_RETURN_IF_ERROR(sandbox.TransferFromSandboxee(&chunk));
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std::cout << "memory size: " << chunk.GetDataSize() << " bytes" << std::endl;
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// Cleanup curl
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SAPI_RETURN_IF_ERROR(api.curl_easy_cleanup(&curl));
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return absl::OkStatus();
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}
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} // namespace
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int main(int argc, char* argv[]) {
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gflags::ParseCommandLineFlags(&argc, &argv, true);
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google::InitGoogleLogging(argv[0]);
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if (absl::Status status = Example2(); !status.ok()) {
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LOG(ERROR) << "Example2 failed: " << status.ToString();
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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