我在很大程度上遵循这个：
http://www.mkyong.com/java/how-to-automate-login-a-website-java-example/
我可以获得表单详细信息。我甚至构造了参数。然后当我发布请求时，我得到内部服务器错误500！
什么错了？这是我的代码：
public class Abc {
private List<String> cookies;
private HttpsURLConnection conn;
private final String USER_AGENT = "Mozilla/5.0";
public static void main(String[] args) {
String proxyHost="43.88.65.10";
String proxyPort="8080";
System.out.println("Setting proxy....");
System.setProperty("http.proxyHost",proxyHost) ;
System.setProperty("https.proxyHost",proxyHost) ;
System.setProperty("https.proxyPort",proxyPort) ;
System.setProperty("http.nonProxyHosts", "localhost|127.0.0.1|43.88.102.142");
System.setProperty("https.nonProxyHosts", "localhost|127.0.0.1|43.88.102.142");
System.out.println("Proxy Set.");
String url = "https://graph.facebook.com/oauth/authorize?client_id=XXXXXXXXXX&redirect_uri=http://localhost:9091&scope=read_stream";
String fb = "https://www.facebook.com/login.php?login_attempt=1&next=http%3A%2F%2Fwww.facebook.com%2Fdialog%2Foauth%3F&redirect_uri=http://localhost:9091/test&scope=publish_stream&client_id=XXXXXXXXXXXX&ret=login";
Abc tryObject = new Abc();
CookieHandler.setDefault(new CookieManager());
// 1. Send a "GET" request, so that you can extract the form's data.
String page = null;
try {
page = tryObject.GetPageContent(url);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String postParams = null;
try {
postParams = tryObject.getFormParams(page, "xxxxxxx@gmail.com", "xxxxx");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("postParams"+postParams);
//postParams = "lsd=AVoao3Js&api_key=XXXXXXXXXXXXX&display=page&enable_profile_selector=&legacy_return=1&profile_selector_ids=&skip_api_login=1&signed_next=1&trynum=1&timezone=&lgnrnd=044127_BBYN&lgnjs=n&email=XXXXXXXXXXX%40gmail.com&pass=XXXXXXXX&persistent=1&default_persistent=0&login=Log+In";
// 2. Construct above post's content and then send a POST request for
// authentication
//tryObject.sendPost(url, postParams);
try {
tryObject.sendPost(fb, postParams);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}//end of main
private String GetPageContent(String url) throws Exception {
URL obj = new URL(url);
conn = (HttpsURLConnection) obj.openConnection();
// default is GET
conn.setRequestMethod("GET");
conn.setUseCaches(false);
// act like a browser
conn.setRequestProperty("User-Agent", USER_AGENT);
conn.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
if (cookies != null) {
for (String cookie : this.cookies) {
conn.addRequestProperty("Cookie", cookie.split(";", 1)[0]);
}
}
int responseCode = conn.getResponseCode();
System.out.println("\nSending 'GET' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in =
new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// Get the response cookies
setCookies(conn.getHeaderFields().get("Set-Cookie"));
return response.toString();
}
public void setCookies(List<String> cookies) {
this.cookies = cookies;
}
public String getFormParams(String html, String username, String password)
throws UnsupportedEncodingException {
System.out.println("Extracting form's data...");
Document doc = Jsoup.parse(html);
System.out.println("doc-->"+doc);
//FB form id
Element loginform = doc.getElementById("loginform");
Elements inputElements = loginform.getElementsByTag("input");
List<String> paramList = new ArrayList<String>();
for (Element inputElement : inputElements) {
String key = inputElement.attr("name");
String value = inputElement.attr("value");
if (key.equalsIgnoreCase("Email"))
value = username;
else if (key.equalsIgnoreCase("Pass"))
value = password;
paramList.add(key + "=" + URLEncoder.encode(value, "UTF-8"));
}
// build parameters list
StringBuilder result = new StringBuilder();
for (String param : paramList) {
if (result.length() == 0) {
result.append(param);
} else {
result.append("&" + param);
}
}
return result.toString();
}
private void sendPost(String url, String postParams) throws Exception {
URL obj = new URL(url);
conn = (HttpsURLConnection) obj.openConnection();
// Acts like a browser
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Host", "www.facebook.com");
conn.setRequestProperty("User-Agent", USER_AGENT);
conn.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
for (String cookie : this.cookies) {
conn.addRequestProperty("Cookie", cookie.split(";", 1)[0]);
}
conn.setRequestProperty("Connection", "keep-alive");
conn.setRequestProperty("Referer", "https://www.facebook.com/");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
System.out.println("Length-->"+postParams.length());
conn.setRequestProperty("Content-Length", Integer.toString(postParams.length()));
conn.setDoOutput(true);
conn.setDoInput(true);
// Send post request
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(postParams);
wr.flush();
wr.close();
int responseCode = conn.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Post parameters : " + postParams);
System.out.println("Response Code : " + responseCode);
BufferedReader in =
new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
System.out.println(response.toString());
} }
我得到的错误是 回复代码：500 java.io.IOException：服务器返回HTTP响应代码：500为URL：https://www.facebook.com/login.php?login_attempt=1&next=http%3A%2F%2Fwww.facebook.com%2Fdialog%2Foauth%3F&redirect_uri=http://localhost:9091/test&scope=publish_stream&client_id=XXXXXXXXXX&ret=login at sun.reflect.NativeConstructorAccessorImpl.newInstance0（Native Method） at sun.reflect.NativeConstructorAccessorImpl.newInstance（Unknown Source） at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（Unknown Source） at java.lang.reflect.Constructor.newInstance（Unknown Source） 在sun.net.www.protocol.http.HttpURLConnection $ 6.run（未知来源） 在sun.net.www.protocol.http.HttpURLConnection $ 6.run（未知来源） at java.security.AccessController.doPrivileged（Native Method） at sun.net.www.protocol.http.HttpURLConnection.getChainedException（Unknown Source） at sun.net.www.protocol.http.HttpURLConnection.getInputStream（Unknown Source） at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream（Unknown Source） 在facebook.Abc.sendPost（Abc.java:216） 在facebook.Abc.main（Abc.java:78） 引起：java.io.IOException：服务器返回HTTP响应代码：500为URL：https://www.facebook.com/login.php?login_attempt=1&next=http%3A%2F%2Fwww.facebook.com%2Fdialog%2Foauth%3F&redirect_uri=http://localhost:9091/test&scope=publish_stream&client_id=XXXXXXXXX&ret=login at sun.net.www.protocol.http.HttpURLConnection.getInputStream（Unknown Source） at java.net.HttpURLConnection.getResponseCode（Unknown Source） at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode（Unknown Source） 在facebook.Abc.sendPost（Abc.java:210） ......还有1个
答案 0 :(得分：2)
我发布下面的大部分代码，以便它可以帮助其他人（对MKYONG非常感谢:)）
public class FbLogin {
private List<String> cookies;
private HttpURLConnection conn;
private final String USER_AGENT = "Mozilla/5.0";
private final String PROXY_HOST = "XXXXXXX";
private final String PROXY_PORT = "80";
private final String charset = "UTF-8";
private final String REDIRECT_URI = "http://localhost:8000/";
boolean redirect = false;
private void setProxy(){
System.setProperty("http.proxyHost", PROXY_HOST);
System.setProperty("http.proxyPort", PROXY_PORT);
System.setProperty("https.proxyHost", PROXY_HOST);
System.setProperty("https.proxyPort", PROXY_PORT);
}
public List<String> getCookies() {
return cookies;
}
public void setCookies(List<String> cookies) {
this.cookies = cookies;
}
public static void main(String[] args) {
String USERNAME = "XXXXX@gmail.com";
String PASSWORD = "XXXXXX";
FbLogin httpd = new FbLogin();
httpd.setProxy();
// make sure cookies is turn on
CookieHandler.setDefault(new CookieManager());
String page = "";
try {
page = httpd.sendGet();
} catch (Exception e) {
e.printStackTrace();
}
String postParams = "";
try {
postParams = httpd.getFormsParams(page, USERNAME, PASSWORD);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
try {
httpd.sendPost(postParams);
} catch (Exception e) {
e.printStackTrace();
}
}
private String sendGet() {
//Generating map for url path and query
String loginUrl = "http://www.facebook.com/v1.0/dialog/oauth";
LinkedHashMap<String, String> queryMap = new LinkedHashMap<String, String>();
queryMap.put("redirect_uri", REDIRECT_URI);
queryMap.put("scope", "read_stream");
queryMap.put("client_id", "XXXXXXXXX");
queryMap.put("ret", "login");
//Creating URL with urlencoder
String fbUrlString = generateUrl(loginUrl, queryMap);
System.out.println("Generated Url ---> " + fbUrlString);
URL myFbURL = null;
try {
myFbURL = new URL(fbUrlString);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
conn = (HttpURLConnection) myFbURL.openConnection();
} catch (IOException e) {
e.printStackTrace();
}
//optional -default is GET
try {
conn.setRequestMethod("GET");
} catch (ProtocolException e) {
e.printStackTrace();
}
//add request headers
conn.addRequestProperty("User-Agent", "Mozilla");
conn.setRequestProperty("Accept-Charset", charset);
conn.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
//Normally 3xx response code is for redirect
int responseCode = 0;
try {
responseCode = conn.getResponseCode();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println( "Sending GET request to URL " + myFbURL);
System.out.println( "Resonse code = " + responseCode);
checkForRedirect(responseCode);
return readPage();
}
private void sendPost(String postParams) throws Exception {
String Url = "https://www.facebook.com/login.php";
LinkedHashMap<String, String> queryMap = new LinkedHashMap<String, String>();
queryMap.put("login_attempt", "1");
queryMap.put("next", "https://www.facebook.com/v1.0/dialog/oauth?redirect_uri=http%3A%2F%2Flocalhost%3A8000%2F&scope=read_stream&client_id=XXXXXXXX&ret=login");
//Creating URL with urlencoder
String postUrl = generateUrl(Url, queryMap);
System.out.println( "Generated Url ---> " + postUrl);
URL obj = new URL(postUrl);
conn = (HttpURLConnection) obj.openConnection();
// Acts like a browser
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("User-Agent", USER_AGENT);
conn.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
// for (String cookie : this.cookies) {
// conn.addRequestProperty("Cookie", cookie.split(";", 1)[0]);
// }
conn.setRequestProperty("Connection", "keep-alive");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setDoOutput(true);
conn.setDoInput(true);
// Send post request
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(postParams);
wr.flush();
wr.close();
int responseCode = conn.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + postUrl);
System.out.println("Post parameters : " + postParams);
System.out.println("Response Code : " + responseCode);
checkForRedirect(responseCode);
readPage();
}
private String getFormsParams(String html, String username, String password)
throws UnsupportedEncodingException {
System.out.println( "Extracting forms data");
Document doc = Jsoup.parse(html);
//Facebook form
Element loginForm = doc.getElementById("login_form");
Elements inputElements = loginForm.getElementsByTag("input");
List<String> paramList = new ArrayList<String>();
for(Element inputElement : inputElements ) {
String key = inputElement.attr("name");
String value = inputElement.attr("value");
System.out.println("key --> " + key);
System.out.println("value --> " + value);
if (key.equalsIgnoreCase("email")){
value = username;
}
else if(key.equalsIgnoreCase("pass")){
value = password;
}
paramList.add(key + "=" + URLEncoder.encode(value, "UTF-8"));
}
//build parameter list
StringBuilder result = new StringBuilder();
for(String param : paramList) {
if(result.length() == 0){
result.append(param);
} else {
result.append("&" + param);
}
}
return result.toString();
}
private String readPage(){
BufferedReader buffReader = null;
try {
buffReader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
} catch (IOException e) {
e.printStackTrace();
}
String inputLine;
StringBuffer response = new StringBuffer();
try {
while ((inputLine = buffReader.readLine()) != null) {
response.append(inputLine);
}
} catch (IOException e) {
e.printStackTrace();
}
try {
buffReader.close();
} catch (IOException e) {
e.printStackTrace();
}
return response.toString();
}
private void redirectHandler(){
//If redirect is true launch the new redirected url
if(redirect) {
// get redirect url from "location" header field
String newURL = conn.getHeaderField("Location");
// get the cookie if need, for login
String cookies = conn.getHeaderField("Set-Cookie");
try {
conn = (HttpURLConnection) new URL(newURL).openConnection();
} catch (IOException e) {
e.printStackTrace();
}
// conn.setRequestProperty("Cookie", cookies)
conn.addRequestProperty("Accept-Language", "en-US,en;q=0.8");
conn.addRequestProperty("User-Agent", "Mozilla");
System.out.println( "Redirecting to " + conn.getURL());
try {
System.out.println( "Resonse code = " + conn.getResponseCode());
} catch (IOException e) {
e.printStackTrace();
}
try {
checkForRedirect(conn.getResponseCode());
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void checkForRedirect(int responseCode){
if(responseCode != HttpURLConnection.HTTP_OK) {
if(responseCode == HttpURLConnection.HTTP_MOVED_TEMP
|| responseCode == HttpURLConnection.HTTP_MOVED_PERM
|| responseCode == HttpURLConnection.HTTP_SEE_OTHER) {
redirect = true;
redirectHandler();
}
}
}
private String generateUrl(String url, LinkedHashMap<String, String> queryMap) {
System.out.println( "Inside generateUrl method ...");
StringBuilder query = new StringBuilder();
char separator = '?';
for(Entry<String, String> entry : queryMap.entrySet()) {
query.append(separator);
separator = '&' ;
try {
query.append(URLEncoder.encode(entry.getKey(), charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
query.append("=");
try {
query.append(URLEncoder.encode(entry.getValue(), charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
url = url + query;
return url;
}
}
答案 1 :(得分：0)
＆＃34;内部服务器错误500＆＃34;表示您的代码导致服务器崩溃。您的代码中存在一些错误。