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remark-download-images: use default black image when 404

See original GitHub issue

When we transform our markdown into latex, and some images lead to 404 error, remark-download-images generate a png file but with html content.

Here is an example from @motet-a tutorial:

![sprite](https://zestedesavoir.com/static/images/sprite.f651d381c5ba.png)

this image is not available. When generating latex, we get this error :

[
    {
        "column": 1,
        "name": "2142:1-2142:97",
        "line": 2142,
        "reason": "Received HTTP404 for: https://zestedesavoir.com/static/images/sprite.f651d381c5ba.png",
        "ruleId": "//zestedesavoir.com/static/images/sprite.f651d381c5ba.png",
        "fatal": false,
        "stack": "Error: Received HTTP404 for: https://zestedesavoir.com/static/images/sprite.f651d381c5ba.png\n    at Request.request.get.on (/opt/zmd/node_modules/remark-images-download/src/index.js:140:26)\n    at emitOne (events.js:121:20)\n    at Request.emit (events.js:211:7)\n    at Request.onRequestResponse (/opt/zmd/node_modules/request/request.js:1066:10)\n    at emitOne (events.js:116:13)\n    at ClientRequest.emit (events.js:211:7)\n    at HTTPParser.parserOnIncomingClient (_http_client.js:551:21)\n    at HTTPParser.parserOnHeadersComplete (_http_common.js:115:23)\n    at TLSSocket.socketOnData (_http_client.js:440:20)\n    at emitOne (events.js:116:13)\n    at TLSSocket.emit (events.js:211:7)\n    at addChunk (_stream_readable.js:263:12)\n    at readableAddChunk (_stream_readable.js:250:11)\n    at TLSSocket.Readable.push (_stream_readable.js:208:10)\n    at TLSWrap.onread (net.js:607:20)",
        "location": {
            "start": {
                "column": 1,
                "offset": 102942,
                "line": 2142
            },
            "indent": [],
            "end": {
                "column": 97,
                "offset": 103038,
                "line": 2142
            }
        },
        "message": "Received HTTP404 for: https://zestedesavoir.com/static/images/sprite.f651d381c5ba.png",
        "source": "https"
    }
]

When image is not properly formatted, latex fails (see https://github.com/zestedesavoir/latex-template/issues/98 ) so I wanted to read the error to generate a fake “black” image to ensure the pdf to be generated.

But as you can see, I have no clue of the generated file name. In this case it was images/D4AuEmg-ie/vr4WW3-8kIv.png .

The content is :

<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>nginx</center>
</body>
</html>

expected

I think many possibilities are acceptable here :

in the error object, send the path to bad image file so that I can change it
automatically create a black square image when status is not 200 OK
change the image to “default.png” (configurable) when answer is not 200OK

Issue Analytics

State:
Created 5 years ago
Reactions:1
Comments:7 (7 by maintainers)

Top GitHub Comments

2reactions

motet-acommented, Dec 9, 2018

@vhf Yes, I have a bunch of improvements and fixes for remark-images-download on my box I have to share. I think I will submit a PR soon.

0reactions

vhfcommented, Aug 29, 2019

This has been released as:

remark-images-download@2.9.0
zmarkdown@6.1.0

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