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Refine client session and its examples.

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This commit is contained in:
Chunting Gu
2019-03-13 13:46:22 +08:00
parent 5abd7e275c
commit 05782b773a
7 changed files with 166 additions and 167 deletions
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example/http_client/main.cc
+70 -102
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@@ -1,5 +1,4 @@
#include <iostream>
#include <thread>
#include "webcc/http_client_session.h"
#include "webcc/logger.h"
@@ -18,130 +17,99 @@ bool kSslVerify = true;
// -----------------------------------------------------------------------------
void GetBoostOrgLicense(HttpClientSession& session) {
try {
auto r = session.Request(HttpRequestArgs{ "GET" }.
url("https://www.boost.org/LICENSE_1_0.txt").
ssl_verify(kSslVerify));
void ExampleBasic() {
HttpClientSession session;
std::cout << r->content() << std::endl;
} catch (const webcc::Exception& e) {
std::cout << "Exception: " << e.what() << std::endl;
}
}
// TODO
void Test(HttpClientSession& session) {
HttpResponsePtr r;
// ---------------------------------------------------------------------------
r = session.Request(HttpRequestArgs{ "GET" }.
url("http://httpbin.org/get"). // moved
parameters({ "key1", "value1", "key2", "value2" }). // moved
headers({ "Accept", "application/json" }). // moved
buffer_size(1000));
auto r = session.Request(HttpRequestArgs{"GET"}
.url("http://httpbin.org/get")
.parameters({"key1", "value1", "key2", "value2"})
.headers({"Accept", "application/json"})
.buffer_size(1000));
std::cout << r->content() << std::endl;
// ---------------------------------------------------------------------------
// If you want to create the args object firstly, there'll be an extra call
// to its move constructor.
// - constructor: HttpRequestArgs{ "GET" }
// - move constructor: auto args = ...
auto args = HttpRequestArgs{"GET"}.
url("http://httpbin.org/get").
parameters({ "key1", "value1", "key2", "value2" }).
headers({ "Accept", "application/json" }).
buffer_size(1000);
r = session.Request(std::move(args));
// ---------------------------------------------------------------------------
// Use pre-defined wrappers.
r = session.Get("http://httpbin.org/get",
{ "key1", "value1", "key2", "value2" },
{ "Accept", "application/json" },
HttpRequestArgs{}.buffer_size(1000));
// ---------------------------------------------------------------------------
// HTTPS is auto-detected from the URL schema.
try {
r = session.Post("httpt://httpbin.org/post", "{ 'key': 'value' }", true,
{"Accept", "application/json"},
HttpRequestArgs{}.ssl_verify(false).buffer_size(1000));
std::cout << r->status() << std::endl << r->content() << std::endl;
} catch (const webcc::Exception& e) {
std::cout << "Exception: " << e.what() << std::endl;
}
}
void TestKeepAlive2(HttpClientSession& session) {
try {
auto r = session.Request(webcc::HttpRequestArgs("GET").
url("https://api.github.com/events").
ssl_verify(false).buffer_size(1500));
} catch (const Exception& e) {
std::cout << "Exception: " << e.what() << std::endl;
}
// If you want to create the args object firstly, there might be an extra
// call to its move constructor (maybe only for MSVC).
// - constructor: HttpRequestArgs{ "GET" }
// - move constructor: auto args = ...
void ExampleArgs() {
HttpClientSession session;
auto args = HttpRequestArgs{"GET"}
.url("http://httpbin.org/get")
.parameters({"key1", "value1", "key2", "value2"})
.headers({"Accept", "application/json"})
.buffer_size(1000);
// Note the std::move().
session.Request(std::move(args));
}
void TestKeepAlive3(HttpClientSession& session) {
try {
auto r = session.Request(webcc::HttpRequestArgs("GET").
url("https://www.boost.org/LICENSE_1_0.txt").
ssl_verify(false));
// Use pre-defined wrappers.
void ExampleWrappers() {
HttpClientSession session;
//std::cout << r->content() << std::endl;
session.Get("http://httpbin.org/get", {"key1", "value1", "key2", "value2"},
{"Accept", "application/json"},
HttpRequestArgs{}.buffer_size(1000));
} catch (const Exception& e) {
std::cout << "Exception: " << e.what() << std::endl;
}
session.Post("http://httpbin.org/post", "{ 'key': 'value' }", true,
{"Accept", "application/json"});
}
void TestKeepAlive4(HttpClientSession& session) {
try {
auto r = session.Request(webcc::HttpRequestArgs("GET").
url("https://www.google.com").
ssl_verify(false));
// HTTPS is auto-detected from the URL scheme.
void ExampleHttps() {
HttpClientSession session;
//std::cout << r->content() << std::endl;
auto r = session.Request(HttpRequestArgs{"GET"}
.url("https://httpbin.org/get")
.parameters({"key1", "value1", "key2", "value2"})
.headers({"Accept", "application/json"})
.ssl_verify(kSslVerify));
} catch (const Exception& e) {
std::cout << "Exception: " << e.what() << std::endl;
}
std::cout << r->content() << std::endl;
}
void ExampleKeepAlive(const std::string& url) {
HttpClientSession session;
// Keep-Alive
session.Request(webcc::HttpRequestArgs("GET").url(url).
ssl_verify(kSslVerify));
// Close
session.Request(webcc::HttpRequestArgs("GET").url(url).
ssl_verify(kSslVerify).
headers({ "Connection", "Close" }));
// Keep-Alive
session.Request(webcc::HttpRequestArgs("GET").url(url).
ssl_verify(kSslVerify));
}
// -----------------------------------------------------------------------------
void Sleep(int seconds) {
if (seconds > 0) {
LOG_INFO("Sleep %d seconds...", seconds);
std::this_thread::sleep_for(std::chrono::seconds(seconds));
}
}
int main() {
WEBCC_LOG_INIT("", LOG_CONSOLE);
HttpClientSession session;
// TEST keep-alive.
// Note that the exception handling is mandatory.
try {
// Keep-Alive by default
session.Get("http://httpbin.org/get");
//ExampleBasic();
//ExampleArgs();
//ExampleWrappers();
//ExampleHttps();
session.Get("http://httpbin.org/get", {}, { "Connection", "Close" });
// Boost.org doesn't support persistent connection so always includes
// "Connection: Close" header in the response.
session.Get("http://httpbin.org/get");
// Both Google and GitHub support persistent connection but they don't like
// to include "Connection: Keep-Alive" header in the responses.
//ExampleKeepAlive("http://httpbin.org/get");
//ExampleKeepAlive("https://www.boost.org/LICENSE_1_0.txt");
//ExampleKeepAlive("https://www.google.com");
//ExampleKeepAlive("https://api.github.com/events");
} catch (const Exception& e) {
std::cout << "Exception: " << e.what() << std::endl;