fix: respect resource mime type in responses#170
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The server was ignoring mime types set on resources, defaulting to text/plain for strings and application/octet-stream for bytes. Now properly preserves the specified mime type in both FastMCP and low-level server implementations. Note that this is breaks backwards compatibility as it changes the return values of read_resource() on FastMCP. It is BC compatible on lowlevel since it only extends the callback. Github-Issue: #152 Reported-by: eiseleMichael
Update README examples to show proper handling of the new read_resource() return value that includes mime type information. Github-Issue:#152
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jspahrsummers
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Jan 27, 2025
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I think we should make this follow the spec more closely if we're going to break backwards compatibility anyway. |
Introduce ReadResourceContents type to properly handle MIME types in resource responses. Breaking change in FastMCP read_resource() return type. Github-Issue:#152
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What about multiple result values, per my comment?
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I thought about it, but honestly, i want to converge to one return value so people dont have to match on the return value. I chose the current appraoch as I want to keep lowlevel fairly BC compatible until v2.0.0 but I am okay changing the higher level FastMCP return value around, since its a bit more faster moving for 1.3.0. |
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Summary
Notable this is a BC breaking change due to the new return values in
read_resource()on FastMCP.Test plan