JAVA:http发布请求 [英] JAVA: http post request
本文介绍了JAVA:http发布请求的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我必须向网络服务发布请求,以使用用户名和密码对用户进行身份验证。
I have to do post request to a web-service to authenticating the user with username and password.
我对以下帖子请求有疑问:
I have a problem with following post request:
public String postTest(String action, ConnectionParametrData [] parameters) {
Uri.Builder builder = new Uri.Builder().scheme(scheme).authority(authority).path(action);
uri = builder.build();
BufferedReader in = null;
String ans = null;
HttpPost request = new HttpPost(uri.toString());
HttpClient defaultClient = new DefaultHttpClient();
try {
request.setHeader("Content-Type", "application/x-www-form-urlencoded");
request.setEntity(new UrlEncodedFormEntity(getValuePairs(parameters)));
HttpResponse response = defaultClient.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"), 8192);
StringBuffer sb = new StringBuffer("");
String line = "";
String newLine = System.getProperty("line.separator");
while((line = in.readLine()) != null) {
sb.append(line + newLine);
}
ans = sb.toString();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ans;
}
当我执行此方法时,服务器抛出错误,告知请求不是发布请求。
When I executed this method server throws error telling the request is not a post request.
但这种方法完美无缺:
private String makePost(String action, ConnectionParametrData [] parameters) throws IOException {
StringBuilder urlBuild = new StringBuilder();
urlBuild.append(scheme).append("://www.").append(authority).append(action);
URL url = new URL(urlBuild.toString());
URLConnection urlConnection = url.openConnection();
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
urlConnection.setUseCaches(false);
urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
DataOutputStream printout = new DataOutputStream(urlConnection.getOutputStream());
String content = getParameters(parameters);
printout.writeBytes(content);
printout.flush();
printout.close();
BufferedReader in = null;
in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()), 8192);
StringBuffer sb = new StringBuffer("");
String line = "";
String newLine = System.getProperty("line.separator");
while((line = in.readLine()) != null) {
sb.append(line + newLine);
}
in.close();
return sb.toString();
}
我更喜欢使用HttpClient而不是URLConecction,
有没有人知道为什么第一种方法未被批准为POST?
I prefer to use HttpClient than URLConecction, does anybody know why first method is not approved as POST?
推荐答案
public String getPostPage(String postUrl, NameValuePair[] data,
String cookie)
{
String html = "";
PostMethod method = null;
String contentStr = null;
try
{
method = new PostMethod(postUrl);
method.addRequestHeader("User-Agent", USER_AGENT);
method.addRequestHeader("Host", "asqx.moni.gucheng.com");
method.addRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
method.addRequestHeader("Referer", "...");
method.getParams().setCookiePolicy(CookiePolicy.IGNORE_COOKIES);
method.addRequestHeader("Cookie", cookie);
method.addRequestHeader("X-MicrosoftAjax", "Delta=true");
method.addRequestHeader("Pragma", "no-cache");
// method.addRequestHeader("Accept-Encoding", "gzip, deflate");
method.addRequestHeader("Accept-Charset", "GB2312,utf-8;q=0.7,*;q=0.7");
method.addRequestHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
method.addRequestHeader("Accept-Language", "zh-cn,zh;q=0.5");
method.setRequestBody(data);
int statusCode = client.executeMethod(method);
if(statusCode == HttpStatus.SC_OK)
{
InputStream in = method.getResponseBodyAsStream();
if (in != null) {
byte[] tmp = new byte[4096];
int bytesRead = 0;
ByteArrayOutputStream buffer = new ByteArrayOutputStream(1024);
while ((bytesRead = in.read(tmp)) != -1) {
buffer.write(tmp, 0, bytesRead);
}
byte[] bt = buffer.toByteArray();
String gbk = new String(bt, "GBK");
String utf8 = new String(bt, "UTF-8");
if (gbk.length() < utf8.length()) {
bt = null;
bt = gbk.getBytes("UTF-8");
html = new String(bt, "UTF-8");
html = html.replaceFirst(
"[cC][hH][aA][rR][sS][eE][tT]\\s*?=\\s*?([gG][bB]2312|[gG][bB][kK]|[gG][bB]18030)",
"charset=utf-8");
} else if (gbk.length() > utf8.length()) {
html = buffer.toString();
} else {
html = buffer.toString();
}
buffer.close();
contentStr = new String("abc".getBytes(), "UTF-8");
contentStr = html;
in.close();
in = null;
}
}
else
{
contentStr = null;
}
} catch (Exception e)
{
log.error(e);
} finally
{
if (method != null)
method.releaseConnection();
}
return contentStr;
}
我使用mothod发布并获取返回内容。希望可以帮到你。
I use the mothod to post and get return content. Hope can help you.
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