java HttpGet 添加标头
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HttpGet adding header
提问by Ken
I am creating a httpClient and I want to add certain header to my HttpGet request
My current code produces the following request.
我正在创建一个 httpClient 并且我想向我的 HttpGet 请求添加某些标头
我当前的代码产生以下请求。
GET /folder/index.html HTTP/1.0
Host: localhost:4444
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.2.1 (java 1.5)
GET /folder/index.html HTTP/1.0
Host: localhost:4444
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.2.1 (java 1.5)
What I want is to add another header (If-Modified-Since) in that request .
How can I do it?
Thank you :)
我想要的是在该请求中添加另一个标头（If-Modified-Since）。
我该怎么做？
谢谢 ：）
public String httpGet(String s) {
String url = s;
StringBuilder body = new StringBuilder();
httpclient = new DefaultHttpClient(); // create new httpClient
HttpGet httpGet = new HttpGet(url); // create new httpGet object
try {
response = httpclient.execute(httpGet); // execute httpGet
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == HttpStatus.SC_OK) {
// System.out.println(statusLine);
body.append(statusLine + "\n");
HttpEntity e = response.getEntity();
String entity = EntityUtils.toString(e);
body.append(entity);
} else {
body.append(statusLine + "\n");
// System.out.println(statusLine);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
httpGet.releaseConnection(); // stop connection
}
return body.toString(); // return the String
}
回答by hall.stephenk
回答by Carl-
Use the setHeader() method on the HttpGet object like follows for the first one
在 HttpGet 对象上使用 setHeader() 方法，如下所示用于第一个
httpGet.setHeader("If-Modified-Since","11/26/2012");
and then use addHeader() method on the HttpGet object like as follows for the second header.
然后在 HttpGet 对象上使用 addHeader() 方法，如下所示用于第二个标头。
httpGet.addHeader("If-Expires-On","11/26/2014");
