This content originally appeared on HackerNoon and was authored by Nicolas Frankel
Last week, I described how to add a dynamic watermark to your images on the JVM. I didn't find any library, so I had to develop the feature, or, more precisely, an embryo of a feature, by myself. Depending on your tech stack, you must search for an existing library or roll up your sleeves. For example, Rust offers such an out-of-the-box library. Worse, this approach might be impossible to implement if you don't have access to the source image.
\ Another alternative is to use ready-made components, namely imgproxy and Apache APISIX. I already combined them to resize images on-the-fly.
\ Here's the general sequence flow of the process:
\
- When APISIX receives a specific pattern, it calls
imgproxywith the relevant parameters imgproxyfetches the original image and the watermark to apply- It watermarks the original image and returns the result to APISIX
\
Let's say the pattern is /watermark/*.
We can define two routes:
\
routes:
- uri: "*" #1
upstream:
nodes:
"server:3000": 1
- uri: /watermark/* #2
plugins:
proxy-rewrite: #3
regex_uri:
- /watermark/(.*)
- /dummy_sig/watermark:0.8:nowe:20:20:0.2/plain/http://server:3000/$1 #4
upstream:
nodes:
"imgproxy:8080": 1 #5
\
- Catch-all route that forwards to the web server
- Watermark images route
- Rewrite the URL…
- …with an
imgproxy-configured route and… - …forward to
imageproxy
\
You can find the exact rewritten URL syntax in imgproxy documentation. The watermark itself is configured via a single environment variable. You should buy imgproxy's Pro version if you need different watermarks. As a poor man's alternative, you could also set up different instances, each with its watermark, and configure APISIX to route the request to the desired instance.
\
In this post, we implemented a watermarking feature with the help of imgproxy. The more I think about it, the more I think they make a match made in Heaven.
\ The complete source code for this post can be found on GitHub:
https://github.com/ajavageek/watermark-on-the-fly?embedable=true
To go further:
\
\ Originally published at A Java Geek on July 7th, 2024
\
This content originally appeared on HackerNoon and was authored by Nicolas Frankel
Nicolas Frankel | Sciencx (2024-07-11T12:16:55+00:00) Dynamic Image Watermarking Made Simple with imgproxy and Apache APISIX. Retrieved from https://www.scien.cx/2024/07/11/dynamic-image-watermarking-made-simple-with-imgproxy-and-apache-apisix/
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