enctype | 易学教程

What is the default enctype for an HTML form?

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问题 Say I've got that form holding some inputs: <form action="demo_post_enctype.asp" method="post" > First name: <input type="text" name="fname"><br> Last name: <input type="text" name="lname"><br> <input type="submit" value="Submit"> </form> If I submit this form: which enctype does the browser use? Is there a well-defined default type? Or does every browser pick it's own enctype (out of the three allowed ones, of course)? 回答1: The invalid value default for these attributes is the application/x

multipart/form-data enctype ignored

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问题 I have defined a form as multipart/form-data enctype. When I press a command button the request is not send with 'multipart/form-data' content-type. <h:form id="form" method="post" enctype="multipart/form-data"> <input type="file" ></input> <p:commandButton id="save" icon="saveBt" value="#{msgs.saveBt}" ... /> </h:form> In the developer tools console I can see the Content-Type as application/x-www-form-urlencoded; charset=UTF-8. I'm working with JSF 2.1 and Primefaces 5.1. Thanks 回答1: You are

HTML forms: issues combining charset with enctype in Firefox

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问题 I have a Web site with a message board. The board lets people post messages and include attachments. I had a problem where my site was hiccuping every time someone wrote a post with non-Unicode characters. In an effort to solve it, I changed my HTML form code from enctype="multipart/form-data" (as I'm accepting file uploads) to: enctype="multipart/form-data;charset=UTF-8" This solved the character problem. But it broke the file upload capability in Firefox 2 through 3.5. Firefox accepts all

Can't Pass MultipartFile through Ajax JAVA [duplicate]

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问题 This question already has answers here : What is a NullPointerException, and how do I fix it? (12 answers) Closed last year . I'm trying to send a file from my jsp to controller via ajax, im getting EXCEPTION:Null Error, below is my code: Controller: @RequestMapping(value = "/schedulebatch",method = RequestMethod.POST,params="insertData") public @ResponseBody String addBatch(@RequestParam( @RequestParam(value="upfile",required=false) MultipartFile upfile) throws Exception { if(!upfile.isEmpty

url encoding, Form encoding and mailto: encoding

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问题 I am a little bit confused about the whole encoding issues related to HTML. I am not refering to the charset in the headers or encoding in the XML prologue. That I get. Lets me explain. When the "mailto:" is used along with a anchor or a submit button in a form, white space is encoded as "%20" and "line feed/carriage return/new line/end of line" is encoded as %0A. While when the enctype attribute is used on a form with a value of "application/x-www-form-urlencoded" the white space is encoded

CommandButton does not fire action when <h:form> includes enctype=“multipart/form-data”

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问题 I have already posted a question regarding p:fileupload a few days ago. After digging deeper into this problem I realized that my main issue seems to be of a different origin and I therefore opened up a new question. I am developing a web app (JSF2.2) for mobile devices where a user can upload a file at several occasions. I want to use Primefaces' p:fileupload component for this job which does not seem to work. I discovered that the problem seems to be connected with the enctype="multipart

getRealPath() returns false (Laravel 5.2 & Image Intervention)

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问题 When uploading images, getRealPath() always returns false : $image_file = $request->file('image_file'); $image_file->getRealPath(); // ---> FALSE Here is the result of dd($image_file); : Also, when I try to use it with Image Intervention: $image_file = $request->file('image_file'); Image::make($image_file->getRealPath())->..... I am getting the following error: NotReadableException in AbstractDecoder.php line 323: Image source not readable Obviously because getRealPath() returns false ...

$_POST variables not working with $_FILES and multipart/form-data

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问题 Problem: Whenever I change the enctype on my HTML form to multipart/form-data , $_POST variables do not populate in my php script. Users upload files along with filling out a form, and the files upload to the server but the $_POST variables do not populate. Code: My HTML form that collects the data text/picture. index.php <form name="myForm" METHOD="POST" ACTION="" enctype="multipart/form-data"> <input type="text" name="text1" id="text1"> <input type="text" name="text2" id="text2"> <input

Firefox Upload Form Issue

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问题 I've created an upload script in php that takes a file, resizes it, and creates a cropped square thumbnail. The script itself seems to work fine. However, when I tried to upload an image through Firefox, on clicking the submit button the browser shows the loading animation, but it never calls the script, it just stays on the current page. If don’t upload an image, then the script can be found and is run. I tried in safari, and I don’t get the same problem, I can upload an image from the form,

HttpRequest 中getParameter() ，getInputStream()，requ

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request.getParameter() 、 request.getInputStream()和request.getReader() 使用体会 1.遇到问题：使用s2sh框架的时候再通过url访问某个action的时候调用 request.getReader() ，通过这个方法得不到数据流。但是request的parametermap中却又url参数。 2.解决问题：通过在网上查找内容，但是我也不知道该怎么搜。最终还是搜到一份答案，我认为还算合理的。现在总结如下。 1）form表单提交数据是的编码不同，可以有多种如 enctype=application/x- www-form-urlencoded ，这种编码方式是默认的编码方式。这种编码方式（ application/x-www-form-urlencoded ）虽然简单，但对于传输大块的二进制数据显得力不从心。对于传输大块的二进制数这类数据，浏览器采用了另一种编码方式，即 "multipart/form-data" 的编码方式：浏览器可以很容易将表单内的数据和文件放在一起发送。这种编码方式先定义好一个不可能在数据中出现的字符串作为分界符，然后用它将各个数据段分开，而对于每个数据段都对应着 HTML 页面表单中的一个Input 区，包括一个 content-disposition 属性