PDFs in Amazon S3 don't open in Chrome for view

Question

I have a website which is developed in PHP and hosted in amazon server. PDF files that are uploaded in server are not opening for view in chrome browser but this pdf file is opening in other browser (internet explorer) for viewing. In chrome it is downloaded. I want this pdf to be open for viewing. code for link is

<a href="<?php echo $filename;?>" target="_blank"><?php echo $data['File_Label'];?></a>

URL: Please click here

But below file is opening for viewing in chrome Please check this

Same problem with opera. If other link like http://ozlabs.org/~dgibson/papers/dtc-paper.pdf open in the browser, the problem is probably the "Content-Type: application/octet-stream" HTTP header. Don't know a solution — Daniel Alder, Oct 03 '16 at 13:12
@RiggsFolly, the question is not related to chrome - no browser will open the file as "pdf" if the content-type header is not set correctly to pdf. — Dekel, Oct 03 '16 at 13:14
check this : http://stackoverflow.com/questions/4853898/display-pdf-within-web-browser — Rijin, Oct 03 '16 at 13:16
@Dekel Then surley the servers mime.types should cope with that — RiggsFolly, Oct 03 '16 at 13:16
@RiggsFolly, not exactly - when using S3 - you set the mime-type when uploading the file to the S3 (if not - the default octet-stream is used). You can set the correct mime-type while uploading, or afterwards. Updated my answer, you can check. — Dekel, Oct 03 '16 at 13:19
@Dekel: by AWS SDK [code is $s3->putObjectFile($tmp, $bucket , $sub_bucket.$actual_image_name, S3::ACL_PUBLIC_READ) ] where $tmp= Temp Name, $bucket= S3 Bucket name, $actual_image_name= Original file name — Yugal Kishor Bais, Oct 03 '16 at 13:22
http://idtc-icai.s3.amazonaws.com/download/the_constitution_2016.pdf this file is opening for viewing in chrome. please check — Yugal Kishor Bais, Oct 03 '16 at 13:26
Can you add a link to the SDK you are using? I can't find this function in the sdk provided by aws. — Dekel, Oct 03 '16 at 13:32
@Dekel: http://undesigned.org.za/2007/10/22/amazon-s3-php-class/documentation please see this — Yugal Kishor Bais, Oct 03 '16 at 13:37
@Dekel: Thanks, I used $s3->putObjectFile($tmp, $bucket , $sub_bucket.$actual_image_name, S3::ACL_PUBLIC_READ,array(),'application/pdf'); and it is working now. — Yugal Kishor Bais, Oct 04 '16 at 11:42

score 18 · Accepted Answer · edited Nov 21 '19 at 15:21

18

If you want the browser to treat the file as pdf you should let him know that his file is a pdf. The way to do so is to send the relevant header:

Content-type: application/pdf

The current header that is sent by s3 is:

Content-type: application/octet-stream

Since you upload the files to s3 - you can either set the correct mime-type for the file during uploading or afterward, using some of the s3 tools (for example s3cmd for windows).

According to the link to the documentation you provided, the putObjectFile function is deprecated, but this is the definition:

putObjectFile (string $file, string $bucket, string $uri, [constant $acl = S3::ACL_PRIVATE], [array $metaHeaders = array()], [string $contentType = null])

As you can see - the last parameter is contentType - so you can set it to application/pdf when uploading the file.
This will set the correct header when downloading.

edited Nov 21 '19 at 15:21

bilal malik

88
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answered Oct 03 '16 at 13:09

Dekel

60,707
10
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Look its an anchor tag that is being used – RiggsFolly Oct 03 '16 at 13:14
@Dekel PDF link is created in index page and it is simple html anchor tag. how do I put content-type for that particular link. – Yugal Kishor Bais Oct 03 '16 at 13:16
This is not related to the html - the header is something that the server is sending. – Dekel Oct 03 '16 at 13:16
Now that I like much better UV, and I learnt something about S3 too, thanks – RiggsFolly Oct 03 '16 at 13:19
Will appreciate to know from the down-voter why did I get a down vote on the answer! – Dekel Oct 03 '16 at 13:22
Probably @AjayThakur being spiteful because someone downvoted his answer, and it probably was not even you that did it – RiggsFolly Oct 03 '16 at 13:26
Wasn't me. @AjayThakur - if the downvote was yours I would appreciate an explanation here. – Dekel Oct 03 '16 at 13:29

PDFs in Amazon S3 don't open in Chrome for view

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