
An enum doesn&#39;t make much sense.  MIME types are open-ended.  That is, the list is not finite: new types are added from time to time.

See [RFC4288: Media Type Specifications and Registration Procedures][1]

  [1]: http://www.ietf.org/rfc/rfc4288.txt?number=4288


[IANA&#39;s database](http://www.iana.org/assignments/media-types/) is most likely to be complete. Currently, they have the list available in CSV format at `https://www.iana.org/assignments/media-types/application.csv`. I am assuming this is a stable URL whose content changes as updates are made. If you want to stay up to date, you&#39;d need to put together a mechanism that is appropriate for your needs.

There is also the [mime.types](http://svn.apache.org/viewvc/httpd/httpd/trunk/docs/conf/mime.types?view=co) file that comes with Apache which seems to have been derived from the said list.

I&#39;m trying to build a Servlet that calls a JSP page similar to the following:

	public void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws IOException, ServletException {
		req.getRequestDispatcher(&quot;/WEB-INF/main.jsp&quot;).forward(req, resp);
	}

I need this Servlet to respond to the domain&#39;s root (eg: http://example.com/) so I&#39;m using the following mapping in the web.xml:

	&lt;servlet-mapping&gt;
		&lt;servlet-name&gt;MainServlet&lt;/servlet-name&gt;
		&lt;url-pattern&gt;/*&lt;/url-pattern&gt;
	&lt;/servlet-mapping&gt;

The problem I&#39;m having is that this matches EVERYTHING, so when the dispatcher forwards to &quot;/WEB-INF/main.jsp&quot; this matches the url-pattern so the Servlet gets run again. This results in a loop that runs until it dies with a [java.lang.StackOverflowError][1].

How can I match the root without preventing other scripts from being runnable?


  [1]: http://java.sun.com/j2se/1.4.2/docs/api/java/lang/StackOverflowError.html

How can I map a &quot;root&quot; Servlet so that other scripts are still runnable?

Ruby is slow at certain things.  But what parts of it are the most problematic?

How much does the garbage collector affect performance?  I know I&#39;ve had times when running the garbage collector alone took several seconds, especially when working with OpenGL libraries.

I&#39;ve used matrix math libraries with Ruby that were particularly slow.  Is there an issue with how ruby implements basic math?

Are there any dynamic features in Ruby that simply cannot be implemented efficiently?  If so, how do other languages like Lua and Python solve these problems?

Has there been recent work that has significantly improved performance?


What makes Ruby slow?

The closest thing I could find was `System.Net.Mime.MediaTypeNames` but that doesn&#39;t seem to have everything (like json) since it seems to be more focused around email attachments.



Is there an enum for the ContentType property on a HttpWebResponse (&quot;text/plain&quot;, &quot;application/octet-stream&quot; etc.)?

<p>The closest thing I could find was <code>System.Net.Mime.MediaTypeNames</code> but that doesn't seem to have everything (like json) since it seems to be more focused around email attachments.</p>


I&#39;m trying to process incoming JSON/Ajax requests with Django/Python.

[`request.is_ajax()`][1] is `True` on the request, but I have no idea where the payload is with the JSON data.

`request.POST.dir` contains this:

    [&#39;__class__&#39;, &#39;__cmp__&#39;, &#39;__contains__&#39;, &#39;__copy__&#39;, &#39;__deepcopy__&#39;, &#39;__delattr__&#39;,
     &#39;__delitem__&#39;, &#39;__dict__&#39;, &#39;__doc__&#39;, &#39;__eq__&#39;, &#39;__ge__&#39;, &#39;__getattribute__&#39;,
    &#39;__getitem__&#39;, &#39;__gt__&#39;, &#39;__hash__&#39;, &#39;__init__&#39;, &#39;__iter__&#39;, &#39;__le__&#39;, &#39;__len__&#39;,
     &#39;__lt__&#39;, &#39;__module__&#39;, &#39;__ne__&#39;, &#39;__new__&#39;, &#39;__reduce__&#39;, &#39;__reduce_ex__&#39;, &#39;__repr__&#39;, 
    &#39;__setattr__&#39;, &#39;__setitem__&#39;, &#39;__str__&#39;, &#39;__weakref__&#39;, &#39;_assert_mutable&#39;, &#39;_encoding&#39;, 
    &#39;_get_encoding&#39;, &#39;_mutable&#39;, &#39;_set_encoding&#39;, &#39;appendlist&#39;, &#39;clear&#39;, &#39;copy&#39;, &#39;encoding&#39;, 
    &#39;fromkeys&#39;, &#39;get&#39;, &#39;getlist&#39;, &#39;has_key&#39;, &#39;items&#39;, &#39;iteritems&#39;, &#39;iterkeys&#39;, &#39;itervalues&#39;, 
    &#39;keys&#39;, &#39;lists&#39;, &#39;pop&#39;, &#39;popitem&#39;, &#39;setdefault&#39;, &#39;setlist&#39;, &#39;setlistdefault&#39;, &#39;update&#39;, 
    &#39;urlencode&#39;, &#39;values&#39;]

There are apparently no keys in the request post keys.

When I look at the POST in [Firebug][2], there is JSON data being sent up in the request.


  [1]: https://docs.djangoproject.com/en/stable/ref/request-response/#django.http.HttpRequest.is_ajax
  [2]: http://en.wikipedia.org/wiki/Firebug

Where&#39;s my JSON data in my incoming Django request?

I didn&#39;t see any difference with or without this head information yet.

Is header(&#39;Content-Type:text/plain&#39;); necessary at all?

I want to get a MIME Content-Type from a given extension (preferably without accessing the physical file). I have seen some questions about this and the methods described to perform this can be resumed in:

 1. Use [registry information][1].
 2. Use [urlmon.dll&#39;s FindMimeFromData][2].
 3. Use [IIS information][3].
 4. Roll your own MIME mapping function. Based on [this table][4], for example.

I&#39;ve been using no.1 for some time but I realized that the information provided by the registry is not consistent and depends on the software installed on the machine. Some extensions, like .zip don&#39;t use to have a Content-Type specified.

Solution no.2 forces me to have the file on disk in order to read the first bytes, which is something slow but may get good results.

The third method is based on Directory Services and all that stuff, which is something I don&#39;t like much because I have to add COM references and I&#39;m not sure it&#39;s consistent between IIS6 and IIS7. Also, I don&#39;t know the performance of this method.

Finally, I didn&#39;t want to use my own table but at the end seems the best option if I want a decent performance and consistency of the results between platforms (even Mono).

Do you think there&#39;s a better option than using my own table or one of other described methods are better? What&#39;s your experience?

  [1]: https://stackoverflow.com/questions/1029740/get-a-mime-from-an-extention/1029796#1029796
  [2]: https://stackoverflow.com/questions/58510/in-c-how-can-you-find-the-mime-type-of-a-file-based-on-the-file-signature-not-th/58570#58570
  [3]: https://stackoverflow.com/questions/174888/asp-net-iis6-how-to-search-the-servers-mime-map/174988#174988
  [4]: http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types

File extensions and MIME Types in .NET

Suppose I write a REST service whose intent is to add a new data item to a system.

I plan to POST to 

    http://myhost/serviceX/someResources

Suppose that works, what response code should I use? And what content might I return.

I&#39;m looking at the [definitions][1] of HTTP response codes and see these possibilities:

200: Return *an entity describing or containing the result of the action;*

201: which means CREATED. Meaning *The request has been fulfilled and resulted in a new resource being created. The newly created resource can be referenced by the URI(s) returned in the entity of the response, with the most specific URI for the resource given by a Location header field. The response SHOULD include an entity containing a list of resource characteristics and location(s) from which the user or user agent can choose the one most appropriate. The entity format is specified by the media type given in the Content-Type header field. *

The latter sounds more in line with the Http spec, but I&#39;m not at all clear what 

&gt; The response SHOULD include an entity
&gt; containing a list of resource
&gt; characteristics and location(s)

means.

Recommendations? Interpretations?


  [1]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

Create request with POST, which response codes 200 or 201 and content

Is there a way to find out the MIME type (or is it called &quot;Content-Type&quot;?) of a file in a Linux bash script?

The reason I need it is because ImageShack appears to need it to upload a file, as for some reason it detects the .png file as an `application/octet-stream` file.
 
I’ve checked the file, and it really is a PNG image:
    
    $ cat /1.png 
    ?PNG
    (with a heap load of random characters)

This gives me the error:

    $ curl -F &quot;fileupload=@/1.png&quot; http://www.imageshack.us/upload_api.php
    &lt;links&gt;
    &lt;error id=&quot;wrong_file_type&quot;&gt;Wrong file type detected for file 1.png:application/octet-stream&lt;/error&gt;
    &lt;/links&gt;


This works, but I need to specify a MIME-TYPE.

    $ curl -F &quot;fileupload=@/1.png;type=image/png&quot; http://www.imageshack.us/upload_api.php

How can I find out a file&#39;s MIME type (Content-Type)?

Do I have to specify a MIME type if the uploaded file has no extension?
In other words is there a default general MIME type?

Unknown file type MIME?

I have a web app where the user needs to upload a .zip file.  On the server-side, I am checking the mime type of the uploaded file, to make sure it is `application/x-zip-compressed` or `application/zip`.

This worked fine for me on Firefox and IE.  However, when a coworker tested it, it failed for him on Firefox (sent mime type was something like &quot;`application/octet-stream`&quot;) but worked on Internet Explorer.  Our setups seem to be identical: IE8, FF 3.5.1 with all add-ons disabled, Win XP SP3, WinRAR installed as native .zip file handler (not sure if that&#39;s relevant).

So my question is: **How does the browser determine what mime type to send?**

&lt;i&gt;Please note: I know that the mime type is sent by the browser and, therefore, unreliable.  I am just checking it as a convenience--mainly to give a more friendly error message than the ones you get by trying to open a non-zip file as a zip file, and to avoid loading the (presumably heavy) zip file libraries.&lt;/i&gt;

How is mime type of an uploaded file determined by browser?

Is there a way to use `intent.setType()` and supply multiple broad types (like images *and* video)?

I am using an `ACTION_GET_CONTENT`. It seems to be working with just comma-separated types.

Multiple MIME types in Android

Is there a resource that lists ALL the mimeTypes in existence?

I have found a few places with under 1000 mimeTypes, but then they still don&#39;t include common ones like .rar, .fla, .rb, .docx!

Does anyone have a COMPLETE list of mimetypes?  Not down to the most obsure &quot;company-only&quot; ones, but at least all of the ones we might use.

Also, I&#39;m looking for a list that maps file extensions to mimeTypes.

List of ALL MimeTypes on the Planet, mapped to File Extensions?

What is the difference between &quot;image/png&quot; and &quot;image/x-png&quot;?

It seems to me that most of what can be accomplished with **`HttpWebRequest/Response`** can also be accomplished with the **`WebClient`** class. I read somewhere that `WebClient` is a high-level wrapper for `WebRequest/Response`.  
 So far, I can&#39;t see anything that can be accomplished with `HttpWebRequest/Response` that can not be accomplished with `WebClient`, nor where HttpWebRequest/Response will give you more &quot;fine-grained&quot; control. 

When should I use WebClient and when `HttpWebRequest/Response`? (Obviously, `HttpWebRequest/Response` are HTTP specific.)

If `HttpWebRequest/Response` are lower level then `WebClient`, what can I accomplish with `HttpWebRequest/Response` that I cannot accomplish with `WebClient`?

WebClient vs. HttpWebRequest/HttpWebResponse

I am returning a stream in some response setting the appropriate `content-type` header. The behavior I&#39;m looking for is this:

- If the browser is able to render content of the given content type then it should display it in the browser window.

- If the browser doesn&#39;t know how to render the content, then it should display the &quot;save as&quot; dialog where the filename should be the one provided in the response.

The problem is that if I set the `Content-Disposition` header with:

&gt; &quot;attachment; filename=&quot;myfile.txt&quot;&quot;

the browser will always display the &quot;save as&quot; dialog.

If I don&#39;t set `Content-Disposition`, the filename used in the &quot;save as&quot; dialog is the one in the URL that doesn&#39;t work in my case.

I also tried setting `Content-Disposition` to `inline` but the outcome is the same.


How to set response filename without forcing &quot;save as&quot; dialog

I am initiating an HttpWebRequest and then retrieving it&#39;s response.  Occasionally, I get a 500 (or at least 5##) error, but no description.  I have control over both endpoints and would like the receiving end to get a little bit more information.  For example, I would like to pass the exception message from server to client.  Is this possible using HttpWebRequest and HttpWebResponse?

Code:

    try
    {
    	HttpWebRequest webRequest = HttpWebRequest.Create(URL) as HttpWebRequest;
    	webRequest.Method = WebRequestMethods.Http.Get;
    	webRequest.Credentials = new NetworkCredential(Username, Password);
    	webRequest.ContentType = &quot;application/x-www-form-urlencoded&quot;;
    	using(HttpWebResponse response = webRequest.GetResponse() as HttpWebResponse)
    	{
    		if(response.StatusCode == HttpStatusCode.OK)
    		{
    			// Do stuff with response.GetResponseStream();
    		}
    	}
    }
    catch(Exception ex)
    {
    	ShowError(ex);
        // if the server returns a 500 error than the webRequest.GetResponse() method
        // throws an exception and all I get is &quot;The remote server returned an error: (500).&quot;
    }

Any help with this would be much appreciated.

How to get error information when HttpWebRequest.GetResponse() fails

I see many examples but all of them read them into byte arrays or 256 chars at a time, slowly. Why?

Is it not advisable to just convert the resulting `Stream` value into a string where I can parse it?

How to convert WebResponse.GetResponseStream return into a string?

I am calling a third party service and when I ask for a response it throws out an exception that says 

&gt;&quot;Authentication failed because the remote party has closed the transport stream exception&quot;.

 I think that there is a problem in sending credentials. I have even tried supplying new credentials. Here is the full code 


    string get_url = &quot;https://**.*******.com/com/******/webservices/public_webservice.cfc?wsdl&amp;Method=CreateUser&amp;SiteID=**&amp;WSPassword=******&amp;UserName=******&quot;;
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(get_url);
    request.MaximumAutomaticRedirections = 4;
    request.MaximumResponseHeadersLength = 4;
    request.Credentials = CredentialCache.DefaultCredentials;
    //request.UseDefaultCredentials = false;
    //request.Credentials = new System.Net.NetworkCredential(&quot;*****&quot;, &quot;*****&quot;);
    request.ContentType = &quot;application/x-www-form-urlencoded; charset=ISO-8859-1&quot;;

    // Show the sent stream
    //lbl_send_stream.Text = send_stream;
    //lbl_send_stream.Text = get_url;
    // Get UserId And LoginToken From Third Party DB
    // ==============================================
    //Exception gets throwed When code hits here
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
  
[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/bLNdf.png

Content Type	Original Author	Original Content on Stackoverflow
Question	will	View Question on Stackoverflow
Solution 1 - Content Type	Chris W. Rea	View Answer on Stackoverflow
Solution 2 - Content Type	Sinan Ünür	View Answer on Stackoverflow

Is there an enum for the ContentType property on a HttpWebResponse ("text/plain", "application/octet-stream" etc.)?

Content Type Problem Overview

Content Type Solutions

Solution 1 - Content Type

Solution 2 - Content Type

What makes Ruby slow?

How can I map a "root" Servlet so that other scripts are still runnable?

Attributions