The correct type is application/pdf for PDF, not application/force-download. This looks like a hack for some legacy browsers. Always use the correct mimetype if. Solved: When adding a PDF as attachment to a page, the content type of the attachment is usually set to application/pdf. However, sometimes it is. It#;s quite a common scenario with the web to want to force a file to some http response headers: Content-Type: application/octet-stream.

Pdf Mime Type Force

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Force Downloads by setting the correct mime type. GitHub Gist: instantly share code, notes, and snippets. Adding or modifying Content-Disposition headers on the fly to Content- Disposition: attachment for MIME type application/pdf should help force. The file type can be specified by the server with a Content-Type header. I've seen application/force-download used - which ends up as a.

When Firefox 3 or above is first installed, there are two possibilities. First is a clean install with no previous profile and the second is an install with a previous profile likely from Firefox 2.

Remote bug watches

In the first case the Applications tab will only contain a list of files handled by installed plug-ins plus a few other defaults such as mailto.

In the case of a second install with an existing profile from Firefox 2, the Applications tab may contain file types added for Firefox 2 requiring external applications as show in the figure for PowerPoint.

A New File Type As noted above for file types not already in the Applications tab, the first time you attempt to download a new file type the window at the right pops up. For this example a Rich Text Format or rtf file is used called test.

Content-disposition inline instead of attachment

At this point you can either elect to "Save File" initial default or "Open with". If you select "Open with", you can then navigate after clicking the "Choose Once you have made a selection, checking the box "Do this automatically for files like this from now on. Changing a File Type If at some point you decide to change the default action, you can open the action drop down and select "Use other In the example below Microsoft Word was added.

At this point you can elect to view the "Applications Details Without getting overly technical it is instructive to provide a description of the cause of this. Most people, read humans, that use computers are familiar with and understand the meaning of various file suffixes.

In the case of files transferred from a web server to a browser, that is not correct. In other words, how a file is processed by a browser is determined by the Content-Type field in the http Response Header; the file suffix should be ignored when there is a Content-Type field. So, what is the problem? Web servers are complicated software packages. They run from the quite common e. There is virtually no support so the developer had better know what they're doing; which, is often not the case.

To illustrate the point consider two examples. So what can you do? Usually you should try to inform the site's webmaster of the incorrect configuration.

The Helper Applications panel in SeaMonkey 2 will open. Here, you can change download actions in the same way as explained above for Firefox 3. File handling in Firefox 2 and SeaMonkey 1. Certain file extensions may include multiple entries, one for each MIME type associated with that type of file. The Download Actions window will open.

MIME types are not shown by default.

Select a file type entry and click 'Change Action If you want a different application to handle that type, select "Open them with this application" and choose the application. Caution: Make sure that the application you choose can handle the file type.

If you want the file to be saved instead of opened, select "Save them on my computer". In some cases, the option "Use this Plugin" will be available.

When a Content-Type is not specified by the server and sometimes even when it is , the browser can perform what is known as sniffing to try to guess the type by reading the file and looking for patterns.

Type handling Upon receiving a file with an inline or unspecified disposition, the browser needs to try to open it within the browser if possible. To do this, it looks at the file type, and if it recognises the type it will try to open it. Since it's supposed to be the most generic type, denoting an arbitrary stream of bytes, there isn't supposed to be any handler that can apply to all files of this "type".

Force download with PHP and mime types

Some websites have also used non-standard types. A bit of a history lesson To see how PDFs are handled, we can delve a bit into web history.

You might also like: EBOOK TEXT TYPE

See, in the past, browsers had no idea what a PDF is. So they could not open it. Those were most generically known as plugins. These plugins were capable of doing everything any other program could, and could additionally register themselves as a handler for a specific file type that might be otherwise unrecognised by the browser.

Incidentally, this was later found to be a huge security risk and support for these powerful plugins was gradually dropped Of course, after a number of security and performance issues caused by these plugins, the major browser vendors decided to incorporate their own PDF viewers while phasing out support for most plugins.Other download actions can be set from the Opening file dialog box that opens when you first encounter a particlar file type see above.

They run from the quite common e.

Christophe Roussy Christophe Roussy 9, 1 57 Indeed - this logic overrides content disposition and is thus important to remember.

There is virtually no support so the developer had better know what they're doing; which, is often not the case. Granted, the visible effect is the same.