当内容类型为 application/x-www-form-urlencoded 时，Java 读取 POST 数据
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Java read POST data when content-type is application/x-www-form-urlencoded
提问by drimk
I have an API that I'm testing. The API receives POST requests and reads it like this
我有一个正在测试的 API。API 接收 POST 请求并像这样读取它
StringBuffer jb = new StringBuffer();
String line = null;
try {
BufferedReader reader = request.getReader();
while ((line = reader.readLine()) != null)
jb.append(line);
System.out.println("jb: "+jb);
System.out.println("request.getHeader('content-type'): "+request.getHeader("content-type"));
} catch (Exception e) { /*report an error*/ }
All works fine when I send a POST request in "application/json;charset=utf-8"
当我在“application/json;charset=utf-8”中发送 POST 请求时一切正常
httpPost.setHeader("content-type", "application/json;charset=utf-8");
It prints this:
它打印这个：
jb: {"client_domain":"=....); //proper Json data
request.getHeader('content-type'): application/json;charset=utf-8
And I can read the data properly.
我可以正确读取数据。
However my problem is when I send the data the same way but I set the content-type "application/x-www-form-urlencoded;charset=utf-8"
但是我的问题是当我以相同的方式发送数据但我设置了内容类型“application/x-www-form-urlencoded;charset=utf-8”
httpPost.setHeader("content-type", "application/x-www-form-urlencoded;charset=utf-8");
The test is the same just the content-type is different but then it seems that I don't receive any data anymore:
测试相同，只是内容类型不同，但似乎我不再收到任何数据：
jb:
request.getHeader('content-type'): application/x-www-form-urlencoded;charset=utf-8
Any idea?
任何的想法？
/// Update
/// 更新
Here is the Spring Controller
这是弹簧控制器
@RequestMapping(value = {"user/add"}, method = RequestMethod.POST, produces="application/json; charset=utf-8")
@ResponseBody
public ResponseEntity<String> getNewUserApi(HttpServletRequest request,
HttpServletResponse response) throws Exception {
Map<String, Object> jsonObj = new HashMap<String, Object>();
StringBuffer jb = new StringBuffer();
String line = null;
try {
BufferedReader reader = request.getReader();
while ((line = reader.readLine()) != null)
jb.append(line);
System.out.println("jb: "+jb);
System.out.println("request.getHeader('content-type'): "+request.getHeader("content-type"));
} catch (Exception e) { /*report an error*/ }
///I create my JSon that will be sent back
return JsonUtils.createJson(jsonObj);
//UPDATE 2 Here is how I send the data
//更新2这是我发送数据的方式
public static void main(String[] args) throws Exception {
String url = "http://localhost:8080/child/apiv1/user/add";
CloseableHttpClient client = HttpClientBuilder.create().build();
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("content-type", "application/x-www-form-urlencoded;charset=utf-8");
try {
//we had to the parameters to the post request
JSONObject json = new JSONObject();
json.put("client_id", "fashfksajfhjsakfaskljhflakj");
json.put("client_secret", "9435798243750923470925709348509275092");
json.put("client_domain", "dummy.localhost.com");
//create the user json object
JSONObject userObj = new JSONObject();
userObj.put("email", "[email protected]");
userObj.put("name", "Anna Sax");
JSONArray childrenArray = new JSONArray();
JSONObject child1 = new JSONObject();
child1.put("name", "Iphone 6");
child1.put("age", "2");
childrenArray.put(child1);
userObj.put("children", childrenArray);
json.put("user", childObj);
StringEntity params = new StringEntity(json.toString());
httpPost.setEntity(params);
System.out.println("executing request: " + httpPost.getRequestLine());
HttpResponse response;
response = client.execute(httpPost);
//[...]
} //End main
I know it doesn't really make sense to create Json and send it in "application/x-www-form-urlencoded" but it's just that one of our users can't fix his issue and it will only send "application/x-www-form-urlencoded".
我知道创建 Json 并在“application/x-www-form-urlencoded”中发送它真的没有意义，但只是我们的一个用户无法解决他的问题，它只会发送“application/x -www-form-urlencoded”。
回答by THelper
When using Spring, request.getReader()will not work for reading application/x-www-form-urlencodeddata. Instead this data is available as parameters, so you can read it with:
使用 Spring 时，request.getReader()将无法读取application/x-www-form-urlencoded数据。相反，此数据可用作参数，因此您可以使用以下命令读取它：
@PostMapping(path = "/mypostendpoint", consumes = "application/x-www-form-urlencoded")
public void handleFormData(HttpServletRequest request) {
Enumeration<String> params = request.getParameterNames();
while (params.hasMoreElements()) {
String param = params.nextElement();
System.out.println("name = " + param + ", value = " + request.getParameter(param));
}
}
You can test this with curl for example:
例如，您可以使用 curl 进行测试：
curl -X POST http://localhost:8080/mypostendpoint -d 'myparam1=X' -d 'myparam2=Y'
curl -X POST http://localhost:8080/mypostendpoint -d 'myparam1=X' -d 'myparam2=Y'
will print
将打印
name = myparam1, value = X
name = myparam2, value = Y
Alternatively, if you know the possible parameters in advance you can use something like this:
或者，如果您事先知道可能的参数，则可以使用以下方法：
@PostMapping(path = "/mypostendpoint", consumes = "application/x-www-form-urlencoded")
public void handleMyPost(@RequestParam("myparam1") String value1,
@RequestParam("myparam2") String value2) {
System.out.println("value of myparam1 = " + value1);
System.out.println("value of myparam2 = " + value2);
}
回答by Eric
The 'produces' attribute of @RequestMapping shows that the client could only accept application/json data, so you can remove it or change it into 'application/x-www-form-urlencoded'.
@RequestMapping的'produces'属性表明客户端只能接受application/json数据，所以可以去掉或者改成'application/x-www-form-urlencoded'。
