Picture upload via API

[Michael Monschau Monschau]

OXML.$base64encode requires the binary data of the picture. You have to load the data using FileOps first. For example

Do FileOps.$readfile(“path_to_image”,pictData)

Do OXML.$base64encode(pictData,err) Returns base64

Both pictData and base64 variables are of type binary

[Martin FF]

Hi Michael,

Thx for the quick reply,

The problem is not to to read the file but to get it in to readeble charakter data for the api as in my example.

[Dario L.]

It’s been a while, but this should work:

Calculate lString as utf8tochar(lBinary)

[Paul Mulroney Mulroney]

Try something like this:

Calculate vsImageEncoded as utf8tochar(bintobase64(vrResult.delSignature)) ## bintobase64 returns UTF8 ready to send, but we need char because we're building the file ourselves.

Then you can append this to the start

Calculate vsImageEncoded as con(‘data:image/jpeg;base64,’,vsImageEncoded)

Good luck!

Regards,

Paul.

[Martin FF]

Hi Paul,

Thank you for this answer. I went away for a weekend so I just read this post.

Let me put some examples in PHP and a genarator with the picture of Omnis(https://www.omnis.net/wp-content/uploads/2018/11/omnis-Logo.png) as data.

—————————————————————————–

In PHP we have:

$imagedata = file_get_contents(“https://www.omnis.net/wp-content/uploads/2018/11/omnis-Logo.png”);
$base64 = base64_encode($imagedata);
echo $base64 ;

This result in the data you see if you open https://elemart.nl/base64/

—————————————————————————–

If we use a generator like https://www.base64-image.de/ and we use the “Or click here”-button, to enter https://www.omnis.net/wp-content/uploads/2018/11/omnis-Logo.png again with the same result as in PHP.

—————————————————————————–

Thereafter if I use your code the contens of the data is diffrent.

<div style=”font-family:Verdana,Arial,Helvetica,Sans-serif;font-size:14pt”>

Do OXML.$base64encode(“https://www.omnis.net/wp-content/uploads/2018/11/omnis-Logo.png&#8221;,lErrorText) Returns lBinary

Calculate vsImageEncoded as utf8tochar(bintobase64(lBinary))

Breakpoint

Calculate vsImageEncoded as con(‘data:image/png;base64,’,vsImageEncoded)

Breakpoint

Regards,

Martin

</div>

• This reply was modified 1 year, 2 months ago by  Martin FF.

omnis.net

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[Paul Mulroney Mulroney]

Hi Martin,

You don’t need the first part – you just need to get the contents of the file into the variable lbinary, and then do this:

Calculate vsImageEncoded as utf8tochar(bintobase64(lBinary))
Calculate vsImageEncoded as con('data:image/png;base64,',vsImageEncoded)

How you populate lbinary depends on whether you can read the file from disk, or retrieve it from a URL.

To read it from disk, do something like:

Do voFileOps.$openfile('path to the file')
Do voFileOps.$readfile(lbinary)
Do voFileOps.$closefile() 

If you need to fetch it from a website, you need something like this:

HTTPPage ('https://www.omnis.net/wp-content/uploads/2018/11/omnis-Logo.png') Returns lbinary ## fetches header and content
Calculate lbinary as bytemid(lbinary,binsearch(chartoutf8(chr(13,10,13,10)),lbinary)+4,binlength(lbinary)) ## strip off the header and leave the content

Regards,

Paul

omnis.net

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[Uwe Smidt]

Dear Paul,
dear $all,

I have a similar problem with the REST API – maybe you have an idea on how to solve it:
https://www.omnis.net/community/forums/forum/discussion/rest-api-client-post-file/

[Martin FF]

I recommend you for a medal tomorrow at the Omnis event in the hotel tomorrow.
<div>Thx Paul!!</div>

Just one thing for a local file to get, I had to use:
Do FileOps.$readfile(‘Path to File’,lBinary)

[Paul Mulroney Mulroney]

Hi Martin,

Glad it worked for you!

Sorry I can’t make it to the conference, would’ve loved to be there but timing didn’t work for us.

Regards,

Paul

[Deleted User]

1. Base64 Encode the Image: You’re already using <code data-code-tools=””>OXML.$base64encode(“C:\somepicture.jpg”, lErrorText)

   , which is correct to get the binary data encoded.

2. Format the Base64 String: After obtaining the base64 string, you need to prepend the appropriate prefix if you want the full data URL format.

Here’s a sample code snippet that demonstrates how to do fnaf:

plaintext
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<code data-code-tools="">// Step 1: Base64 encode the image Do OXML.$base64encode("C:\somepicture.jpg", lErrorText) Returns lBinary  // Step 2: Check for errors If lErrorText <> "" Then     // Handle the error     Return lErrorText End If  // Step 3: Convert binary to base64 string lBase64String = OXML.$binaryToBase64(lBinary)  // Step 4: Create the data URL format lDataUrl = "data:image/jpeg;base64," + lBase64String  // Now lDataUrl contains the image in the required format

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