Jsoup 登入表單提交問題疑難排解
問題陳述:public void connect() {
try {
Connection.Response loginForm = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/login.php")
.method(Connection.Method.GET)
.execute();
org.jsoup.nodes.Document document = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/authentication.php")
.data("cookieexists", "false")
.data("username", "myUsername")
.data("password", "myPassword")
.cookies(loginForm.cookies())
.post();
System.out.println(document);
} catch (IOException ex) {
Logger.getLogger(WebCrawler.class.getName()).log(Level.SEVERE, null, ex);
}
}
儘管使用了正確的登入憑證,但下面發佈的Jsoup 程式碼無法登入目標網站,顯示登入頁面的HTML程式碼相反。 public void connect() { 嘗試 { Connection.Response loginForm = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/login.php") .method(連接.Method.GET) 。執行(); org.jsoup.nodes.Document 文件 = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/authentication.php") .data("cookie存在", "假") .data("用戶名","我的用戶名") .data("密碼", "我的密碼") .cookies(loginForm.cookies()) 。郵政(); System.out.println(文檔); } catch (IOException ex) { Logger.getLogger(WebCrawler.class.getName()).log(Level.SEVERE, null, ex); } }
解決方案:public void connect() {
try {
Connection.Response loginForm = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/login.php")
.method(Connection.Method.GET)
.execute();
org.jsoup.nodes.Document document = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/authentication.php")
.data("cookieexists", "false")
.data("username", "myUsername")
.data("password", "myPassword")
.cookies(loginForm.cookies())
.post();
System.out.println(document);
} catch (IOException ex) {
Logger.getLogger(WebCrawler.class.getName()).log(Level.SEVERE, null, ex);
}
}
除了使用者名稱、密碼和cookie之外,目標網站還需要兩個附加價值來登入:VIEWSTATE和EVENTVALIDATION。要取得這些值:org.jsoup.nodes.Document document = (org.jsoup.nodes.Document) Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/authentication.php").userAgent("Mozilla/5.0")
.data("myLogin$myUsername", "MyUsername")
.data("myLogin$myPassword, "MyPassword")
.data("myLogin$myLoginButton.x", "22")
.data("myLogin$myLoginButton.y", "8")
.data("__VIEWSTATE", viewState)
.data("__EVENTVALIDATION", eventValidation)
.cookies(loginForm.cookies())
.post();
然後,將這些值加到 post 請求中(順序無關緊要):.data("myLogin$myEnableAutoLogin", "on")
要啟用「記住我」功能,請新增:.data("myLogin$myEnableAutoLogin", "on")
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