THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The code is distributed along with recent versions of Traffic Server, in the plugins/experimental/metalink directory. To build it, pass the --enable-experimental-plugins option to the configure script when you build Traffic Server:
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$ ./configure --enable-experimental-plugins
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When you're done building Traffic Server, add "metalink.so" to your plugin.config file to start using the plugin.
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It implements TS_HTTP_READ_RESPONSE_HDR_HOOK and a null transformation to compute the SHA-256 digest for content as it's added to the cache. It uses SHA256_Init(), SHA256_Update(), and SHA256_Final() from OpenSSL to compute the digest, then it uses TSCacheWrite() to associate the digest with the request URL. This adds a new cache object where the key is the digest and the object is the request URL.
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