http fluent多种请求

来自：https://blog.youkuaiyun.com/chenpeng19910926/article/details/71719205

1.

1. String("Important stuff", ContentType.DEFAULT_TEXT)
2. .execute().returnContent().asBytes();

1. // Execute a POST with a custom header through the proxy containing a request body
2. // as an HTML form and save the result to the file
3. Request.Post("http://somehost/some-form")
4. .addHeader("X-Custom-header", "stuff")
5. .viaProxy(new HttpHost("myproxy", 8080))
6. .bodyForm(Form.form().add("username", "vip").add("password", "secret").build())
7. .execute().saveContent(new File("result.dump"));

还可以直接使用Executor，以便在特定的安全上下文中执行请求，从而将身份验证细节缓存并重新用于后续请求。

1. Executor executor = Executor.newInstance()
2. .auth(new HttpHost("somehost"), "username", "password")
3. .auth(new HttpHost("myproxy", 8080), "username", "password")
4. .authPreemptive(new HttpHost("myproxy", 8080));
6. executor.execute(Request.Get("http://somehost/"))
7. .returnContent().asString();
9. executor.execute(Request.Post("http://somehost/do-stuff")
10. .useExpectContinue()
11. .bodyString("Important stuff", ContentType.DEFAULT_TEXT))
12. .returnContent().asString();

5.1.1. Response 处理

fluent facade API通常减轻用户不必处理连接管理和资源释放。然而，在大多数情况下，这是以缓冲内存中的响应消息内容为代价的。 强烈建议使用ResponseHandler进行HTTP响应处理，以避免在内存中缓冲的内容丢失。

1. Document result = Request.Get("http://somehost/content")
2. .execute().handleResponse(new ResponseHandler<Document>() {
4. public Document handleResponse(final HttpResponse response) throws IOException {
5. StatusLine statusLine = response.getStatusLine();
6. HttpEntity entity = response.getEntity();
7. if (statusLine.getStatusCode() >= 300) {
8. throw new HttpResponseException(
9. statusLine.getStatusCode(),
10. statusLine.getReasonPhrase());
11. }
12. if (entity == null) {
13. throw new ClientProtocolException("Response contains no content");
14. }
15. DocumentBuilderFactory dbfac = DocumentBuilderFactory.newInstance();
16. try {
17. DocumentBuilder docBuilder = dbfac.newDocumentBuilder();
18. ContentType contentType = ContentType.getOrDefault(entity);
19. if (!contentType.equals(ContentType.APPLICATION_XML)) {
20. throw new ClientProtocolException("Unexpected content type:" +
21. contentType);
22. }
23. String charset = contentType.getCharset().displayName();
24. if (charset == null) {
25. charset = "UTF-8";
26. }
27. return docBuilder.parse(entity.getContent(), charset);
28. } catch (ParserConfigurationException ex) {
29. throw new IllegalStateException(ex);
30. } catch (SAXException ex) {
31. throw new ClientProtocolException("Malformed XML document", ex);
32. }
33. }
35. });

总结：我个人感觉这个功能非常的棒，如果对于HTTP请求报文设置相对较少或者需求较为简单这种方法处理很方便，减少了很多臃肿的代码。