Opera 中基于表单/iframe 的文件上传问题 [英] issues with form/iframe based file upload in Opera

查看：16 发布时间：2021/11/11 23:29:31 java file-upload apache-commons

本文介绍了Opera 中基于表单/iframe 的文件上传问题的处理方法，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

解决方案

参考我下面的回答:issues在 Opera 中使用基于表单/iframe 的文件上传

<小时>

每当浏览器不支持 XMLHttpRequest 上传 (Opera) 时，我都会使用 form/iframe 技术将文件发送到服务器.概括地说，这是设置...

创建一个 iframe </li><li>创建表单 <code><form enctype="multipart/form-data" method="POST"></code><ul><li>set target = iframe 的名称，<code>target="file-iframe"</code></li><li>set action = url, <code>action="/upload"</code></li></ul></li><li>将文件输入添加到表单中</li><li>提交表单</li></ol><p>提交表单时，服务器吐出一个异常:</p><pre><code>org.apache.commons.fileupload.MultipartStream$MalformedStreamException:流意外结束在 org.apache.commons.fileupload.MultipartStream.readHeaders(MultipartStream.java:538)在 org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:999)在 org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:965)在 org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331)在 org.apache.commons.fileupload.servlet.ServletFileUpload.getItemIterator(ServletFileUpload.java:148)在 com.beamit.jetty.UploadServlet.doPost(UploadServlet.java:28)在 javax.servlet.http.HttpServlet.service(HttpServlet.java:727)在 javax.servlet.http.HttpServlet.service(HttpServlet.java:820)......</code></pre><p>这是 <code>UploadServlet.java</code> 文件中的代码片段，其中失败发生在片段的最后一行:</p><pre><code>@Override公共无效 doPost(HttpServletRequest 请求，HttpServletResponse 响应){ServletFileUpload up = new ServletFileUpload();尝试 {FileItemIterator iter = up.getItemIterator(request);//<------ 错误...} catch (IOException e) {e.printStackTrace();}...</code></pre><p>我已经尝试调试了几个小时，但一无所获.关于为什么会发生这种情况的任何想法?</p><p>我可以提供使用不同浏览器上传工作/非工作文件的 HTTP 请求，如果需要，还可以提供更多源代码.</p><h2>更多信息</h2><p>对 <strong>Chrome</strong> 中简单hello world"文本文件的 HTTP 请求.</p><pre><code>POST/upload/0145c HTTP/1.1主机:beamit:8080连接:保持连接缓存控制:max-age=0用户代理:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.202 Safari/535.1接受:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8接受编码:gzip、deflate、sdch接受语言:en-US,en;q=0.8接受字符集:ISO-8859-1,utf-8;q=0.7,*;q=0.3推荐人:http://beamit:8080/内容长度:44来源:http://beamit:8080内容类型:多部分/表单数据；边界=----WebKitFormBoundaryQes3eWoFE2iw6kGE</code></pre><p>对 <strong>Opera</strong> 中简单hello world"文本文件的 HTTP 请求.</p><pre><code>POST/upload/f889b HTTP/1.1用户代理:Opera/9.80 (Macintosh; Intel Mac OS X 10.7.2; U; en) Presto/2.9.168 Version/11.52主机:beamit:8080接受:text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/webp, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1接受语言:en,en-US;q=0.9,ja;q=0.8,fr;q=0.7,de;q=0.6,es;q=0.5,it;q=0.4,pt;q=0.3,pt-PT;q=0.2,nl;q=0.1,sv;q=0.1,nb;q=0.1,da;q=0.1,fi;q=0.1,ru;q=0.1,pl;q=0.1,zh-CN;q=0.1,zh-TW;q=0.1,ko;q=0.1,ar;q=0.1,cs;q=0.1,hu;q=0.1,tr;q=0.1接受编码:gzip、deflate推荐人:http://beamit:8080/饼干:__utma=248039316.1622718495.1317335167.1319648741.1319655028.19；__utmb=248039316.4.10.1319655028；__utmc=248039316；__utmz=248039316.1317335167.1.1.utmcsr=(直接)|utmccn=(直接)|utmcmd=(无)连接:保持活动内容长度:76内容类型:多部分/表单数据；边界=----------cah2BDOhbumylzxVY398ZJ</code></pre><p></p><div class="h2_lin"> 解决方案 </div><p>我想出了问题所在.去掉所有不必要的代码和标记后，我只剩下一个简单的表单/iframe 文件上传页面.</p><p>当我动态构建表单时，我将文件输入元素作为子元素插入:</p><pre><code><input type="file" id="file-select-input"/></code></pre><p>...我有这样的事情:</p><pre><code><form enctype="multipart/form-data" id="file-select-form" target="select-file-iframe" method="POST" action="/upload/"><div id="file-select-button" class=""><input type="file" id="file-select-input"/></div><p></表单><iframe style="display: none" id="select-file-iframe" src="javascript:false;"name="select-file-iframe"></iframe></code></pre><p>这个设置给我带来了问题.经过一番调查，发现当我提交上述表单时，输入的文件信息没有被发送.事实证明，这样做的原因是我没有在文件输入元素上指定 <code>name</code> 属性.所以当我把它改成这样:</p><pre><code><input type="file" id="file-select-input" name="file"/></code></pre><p>...一切顺利.</p><h2>SOLUTION</h2> <p>Refer to my answer below: <a href="https://stackoverflow.com/questions/7899327/issues-with-form-iframe-based-file-upload-in-opera/7936689#7936689">issues with form/iframe based file upload in Opera</a></p> <hr> <p>I'm using the form/iframe technique to send files to the server whenever a browser does not support XMLHttpRequest upload (Opera). On a high level, here's the setup...</p><ol> <li>create an iframe <code><iframe src="javascript:false;" name="file-iframe"></iframe></code></li> <li>create a form <code><form enctype="multipart/form-data" method="POST"></code> <ul> <li>set target = iframe's name, <code>target="file-iframe"</code></li> <li>set action = url, <code>action="/upload"</code></li> </ul></li> <li>add the file input to the form</li> <li>submit form</li> </ol><p>When the form is submitted, the server spits out an exception:</p><pre><code>org.apache.commons.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly at org.apache.commons.fileupload.MultipartStream.readHeaders(MultipartStream.java:538) at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:999) at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:965) at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331) at org.apache.commons.fileupload.servlet.ServletFileUpload.getItemIterator(ServletFileUpload.java:148) at com.beamit.jetty.UploadServlet.doPost(UploadServlet.java:28) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) ... ... </code></pre><p>Here is a code snippet in the <code>UploadServlet.java</code> file, where the failure happens in the last line of the snippet:</p><pre><code>@Override public void doPost(HttpServletRequest request, HttpServletResponse response) { ServletFileUpload up = new ServletFileUpload(); try { FileItemIterator iter = up.getItemIterator(request); // <------ ERROR ... } catch (IOException e) { e.printStackTrace(); } ... </code></pre><p>I've been trying to debug this for hours and I'm getting nowhere. Any ideas as to why this might be happening? </p> <p>I can provide the HTTP requests for working/non-working file uploads using a different browser, as well as some more source code if needed.</p> <h2>MORE INFO</h2> <p>HTTP request for a simple "hello world" text file in <strong>Chrome</strong>.</p><pre><code>POST /upload/0145c HTTP/1.1 Host: beamit:8080 Connection: keep-alive Cache-Control: max-age=0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.202 Safari/535.1 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 Referer: http://beamit:8080/ Content-Length: 44 Origin: http://beamit:8080 Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryQes3eWoFE2iw6kGE </code></pre><p>HTTP request for a simple "hello world" text file in <strong>Opera</strong>.</p><pre><code>POST /upload/f889b HTTP/1.1 User-Agent: Opera/9.80 (Macintosh; Intel Mac OS X 10.7.2; U; en) Presto/2.9.168 Version/11.52 Host: beamit:8080 Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/webp, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1 Accept-Language: en,en-US;q=0.9,ja;q=0.8,fr;q=0.7,de;q=0.6,es;q=0.5,it;q=0.4,pt;q=0.3,pt-PT;q=0.2,nl;q=0.1,sv;q=0.1,nb;q=0.1,da;q=0.1,fi;q=0.1,ru;q=0.1,pl;q=0.1,zh-CN;q=0.1,zh-TW;q=0.1,ko;q=0.1,ar;q=0.1,cs;q=0.1,hu;q=0.1,tr;q=0.1 Accept-Encoding: gzip, deflate Referer: http://beamit:8080/ Cookie: __utma=248039316.1622718495.1317335167.1319648741.1319655028.19; __utmb=248039316.4.10.1319655028; __utmc=248039316; __utmz=248039316.1317335167.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none) Connection: Keep-Alive Content-Length: 76 Content-Type: multipart/form-data; boundary=----------cah2BDOhbumylzxVY398ZJ </code></pre><p> </p><div class="h2_lin"> 解决方案 </div><p>I figured out what the issue was. After stripping off all unnecessary code and markup, I was left with a bare-bones form/iframe file upload page. </p> <p>When I am building the form dynamically, I insert the file input element as a child:</p><pre><code><input type="file" id="file-select-input" /> </code></pre><p>... and I had something like this:</p><pre><code><form enctype="multipart/form-data" id="file-select-form" target="select-file-iframe" method="POST" action="/upload/"> <div id="file-select-button" class=""> <input type="file" id="file-select-input" /> </div> </form> <iframe style="display: none" id="select-file-iframe" src="javascript:false;" name="select-file-iframe"></iframe> </code></pre><p>This setup was giving me the issues. After some investigation, it turns out that when I submit the above form, the input file information was not being sent. The reason for this, it turns out, is that I didn't have the <code>name</code> attribute specified on the file input element. So when I changed it to this:</p><pre><code><input type="file" id="file-select-input" name="file" /> </code></pre><p>... things worked.</p> <p>这篇关于Opera 中基于表单/iframe 的文件上传问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！</p> </div> <div class="arc-body-main-more"> <span onclick="unlockarc('2545436');">查看全文</span> </div> </div> <div> </div> <div class="wwads-cn wwads-horizontal" data-id="166" style="max-width:100%;border: 4px solid #666;"></div> </div> </article> <div id="arc-ad-2" class="mb-1"> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-5038752844014834" crossorigin="anonymous"></script> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-5038752844014834" data-ad-slot="3921941283"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <div class="widget bgwhite radius-1 mb-1 shadow widget-rel"> <h5>相关文章</h5> <ul> <li> <a target="_blank" title="Opera中基于form / iframe的文件上传问题" href="/756420.html"> Opera中基于form / iframe的文件上传问题; 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