如何从浏览器中保存.pdf？ [英] How to save a .pdf from a browser?
问题描述
我尝试使用我在stackoverflow上找到的不同方法保存.pdf文件，包括 FileUtils IO ，但是，我总是会损坏它。当我使用记事本打开损坏的文件时，我得到了以下内容：
I tried to save .pdf file using different methods I found on stackoverflow including FileUtils IO, however, I would always get it damaged. As I opened the damaged file using a notepad I got the following stuff:
<HEAD>
<TITLE>
09010b129fasdf558a-
</TITLE>
</HEAD>
<HTML>
<SCRIPT language="javascript" src="./js/windowClose.js"></SCRIPT>
<LINK href="./theme/default.css" rel="stylesheet" type="text/css">
<LINK href="./theme/additions.css" rel="stylesheet" type="text/css">
<BODY leftmargin="0" topmargin="0">
<TABLE cellpadding="0" cellspacing="0" width="100%">
<TR>
<TD class="mainSectionHeader">
<A href="javascript:windowClose()" class="allLinks">
CLOSE
</A>
</TD>
</TR>
</TABLE>
<script language='javaScript'>
alert('Session timed out. Please login again.\n');
window.close();
</script>
</BODY>
</HTML>
后来，我试图保存 .pdf 使用@BalusC提供的答案从浏览器中输入文件。这个解决方案非常有用：我能够摆脱会话问题。但是，它也会产生损坏的.pdf。但是当我用记事本打开它时，它完全不同。不过没有登录问题了：
Later, I tried to save a .pdf file from a browser using the answer provided by @BalusC. This solution is very helpful: I was able to get rid of the session issues. However, it also produces a damaged .pdf. But as I open it with a notepad, it is completely different. There are no login issues anymore though:
<HTML>
<HEAD>
<TITLE>
Evidence System
</TITLE>
</HEAD>
<LINK href="./theme/default.css" rel="stylesheet" type="text/css">
<TABLE cellpadding="0" cellspacing="0" class="tableWidth760" align="center">
<TR>
<TD class="headerTextCtr">
Evidence System
</TD>
</TR>
<TR>
<TD colspan="2">
<HR size="1" noshade>
</TD>
</TR>
<TR>
<TD colspan="2">
<HTML>
<HEAD>
<link href="./theme/default.css" rel="stylesheet" type="text/css">
<script language="JavaScript">
function trim(str)
{
var trmd_str
if(str != "")
{
trmd_str = str.replace(/\s*/, "")
if (trmd_str != ""){
trmd_str = trmd_str.replace(/\s*$/, "")
}
}else{
trmd_str = str
}
return trmd_str
}
function validate(frm){
//check for User name
var msg="";
if(trim(frm.userName.value)==""){
msg += "Please enter your user id.\n";
frm.userName.focus();
}
if(trim(frm.password.value)==""){
msg += "Please enter your password.\n";
frm.userName.focus();
}
if (trim(msg)==""){
frm.submit();
}else{
alert(msg);
}
}
function numCheck(event,frm){
if( event.keyCode == 13){
validate(frm);
}
}
</script>
</HEAD>
<BODY onLoad="document.frmLogin.userName.focus();">
<FORM name='frmLogin' method='post' action='./ServletVerify'>
<TABLE width="100%" cellspacing="20">
<tr>
<td class="mainTextRt">
Username
<input type="text" name="userName" maxlength="32" tabindex="1" value=""
onKeyPress="numCheck(event,this.form)" class="formTextField120">
</TD>
<td class="mainTextLt">
Password
<input type="password" name="password" maxlength="32" tabindex="2" value=""
onKeyPress="numCheck(event,this.form)" class="formTextField120">
</TD>
</TR>
<tr>
<td colspan="2" class="mainTextCtr" style="color:red">
Unknown Error
</td>
</tr>
<tr>
<td colspan="2" class="mainTextCtr">
<input type="button" tabindex="3" value="Submit" onclick="validate(this.form)" >
</TD>
</TR>
</TABLE>
<INPUT TYPE="hidden" NAME="actionFlag" VALUE="inbox">
</FORM>
</BODY>
</HTML>
</TD>
</TR>
<TR>
<TD height="2"></TD>
</TR>
<TR>
<TD colspan="2">
<HR size="1" noshade>
</TD>
</TR>
<TR>
<TD colspan="2">
<LINK href="./theme/default.css" rel="stylesheet" type="text/css">
<TABLE width="80%" align="center" cellspacing="0" cellpadding="0">
<TR>
<TD class="footerSubtext">
Evidence Management System
</TD>
</TR>
<!-- For development builds, change the date accordingly when sending EAR files out to Wal-Mart -->
<TR>
<TD class="footerSubtext">
Build: v3.1
</TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
</HTML>
我还有哪些其他选择？
PS：当我尝试使用 CTRL + Shift + S ，文件保存好了。
推荐答案
从出现的错误响应中只是一个HTML错误页面：
From the errorneous response which appears to be just a HTML error page:
alert（'会话超时。请再次登录。\ n'）;
因此，下载PDF文件似乎需要在有效的HTTP会话中进行。 HTTP会话由cookie支持。 HTTP会话通常在服务器端包含有关当前活动和/或登录用户的信息。
It thus appears that downloading the PDF file is required to take place in a valid HTTP session. The HTTP session is backed by a cookie. The HTTP session in turn contains in the server side usually information about the currenty active and/or logged-in user.
Selenium Web驱动程序完全透明地管理cookie 。您可以按以下方式以编程方式获取它们：
The Selenium web driver manages cookies all by itself fully transparently. You can obtain them programmatically as follows:
Set<Cookie> cookies = driver.manage().getCookies();
手动摆弄 java.net.URL 对Selenium的外部控制，您应该确保自己URL连接使用相同的cookie（因此也保持相同的HTTP会话）。您可以在URL连接上设置cookie，如下所示：
When manually fiddling with java.net.URL outside control of Selenium, you should be making sure yourself that the URL connection is using the same cookies (and thus also maintaining the same HTTP session). You can set cookies on the URL connection as follows:
URLConnection connection = new URL(driver.getCurrentUrl()).openConnection();
for (Cookie cookie : driver.manage().getCookies()) {
String cookieHeader = cookie.getName() + "=" + cookie.getValue();
connection.addRequestProperty("Cookie", cookieHeader);
}
InputStream input = connection.getInputStream(); // Write this to file.
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