[英]how to sending multipart/form-data Post Request in with use of Apache HttpComponents in java
[英]Apache HttpComponents 5: POST form data with HttpAsyncClient
我正在寻找使用HttpAsyncClient
POST 表单数据的解决方案。 到目前为止,我发现的所有示例都只发送了简单的 GET 请求。 这是我到目前为止所得到的:
try (CloseableHttpAsyncClient client = HttpAsyncClients.createDefault()) {
SimpleHttpRequest httpPost = SimpleHttpRequests.post("http://httpbin.org");
// How to add key=value as form data to httpPost?
Future<SimpleHttpResponse> future = client.execute(httpPost, new FutureCallback<SimpleHttpResponse>() {
@Override
public void completed(SimpleHttpResponse simpleHttpResponse) {
System.out.println(simpleHttpResponse.getCode());
System.out.println(simpleHttpResponse.getBody());
}
@Override
public void failed(Exception e) {
System.out.println(e);
}
@Override
public void cancelled() {
System.out.println("cancelled");
}
}
}
我还查看了源代码,在那里我找到了SimpleHttpRequest::setBody
方法和相应的SimpleBody
类。 但它们似乎也不支持表单数据。
基本上,我需要相当于OkHttp
的FormBody
。
在对 Apache HttpComponents 5 的文档和源代码进行了一些挖掘之后,我想出了以下解决方案。 我需要创建一个AsyncRequestProducer
和一个AsyncResponseConsumer
而不是使用SimpleHttpRequests
。 请求生产者对象定义了如何创建我的请求,与SimpleHttpRequest
,它还能够生成我需要的表单主体。 示例代码:
try (CloseableHttpAsyncClient client = HttpAsyncClients.createDefault()) {
client.start();
AsyncRequestProducer producer = AsyncRequestBuilder.post()
.setUri("http://httpbin.org")
.addParameter("key", "value") // <- form parameters in body
.build();
AsyncResponseConsumer<SimpleHttpResponse> consumer = SimpleResponseConsumer.create();
client.execute(producer, consumer, new FutureCallback<SimpleHttpResponse>() {
@Override
public void completed(SimpleHttpResponse simpleHttpResponse) {
System.out.println(simpleHttpResponse.getCode());
System.out.println(simpleHttpResponse.getBody());
}
@Override
public void failed(Exception e) {
System.out.println(e);
}
@Override
public void cancelled() {
System.out.println("cancelled");
}
});
}
或者,我可以使用AsyncEntityProducer
来生成表单主体:
Iterable<NameValuePair> params = Stream.of(new BasicNameValuePair("key", "value"))
.collect(Collectors.toList());
AsyncEntityProducer entityProducer = AsyncEntityProducers.createUrlEncoded(params, Charsets.UTF_8);
AsyncRequestProducer producer = AsyncRequestBuilder.post()
.setUri("http://httpbin.org")
.setEntity(entityProducer)
.build();
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