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fix(sse): don't throw error when get http.StatusNoContent #153

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@adlternative adlternative commented Apr 15, 2025

In our scenario, the successful return value of the MCP SSE server initialize request is 204 NoContent, which currently causes the SSE initialization to fail. Therefore, modify the sendRequest function to also handle http.StatusNoContent to prevent errors from being thrown.

Summary by CodeRabbit

  • Bug Fixes
    • Improved handling of server responses to better recognize additional successful status codes, ensuring more reliable interactions with the server.

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coderabbitai bot commented Apr 15, 2025

Walkthrough

The update modifies the HTTP status code handling logic in the sendRequest method of the SSEMCPClient struct. Specifically, it expands the set of status codes considered successful responses to include 204 (No Content), in addition to the previously accepted 200 (OK) and 202 (Accepted). Any other status code will result in the method reading the response body and returning an error containing the status code and body content. No changes were made to exported or public entity declarations.

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File(s) Change Summary
client/sse.go Updated the sendRequest method to treat HTTP 204 as a successful response, alongside 200 and 202.

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  • client/sse.go (1 hunks)
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client/sse.go (1)

307-309: Good addition of http.StatusNoContent handling

This change appropriately resolves the issue where the SSE initialization would fail when the server returns a 204 No Content status code. The implementation correctly adds http.StatusNoContent to the list of accepted status codes, which aligns with HTTP protocol standards where 204 indicates a successful request that intentionally includes no content in the response body.

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@@ -305,7 +305,8 @@ func (c *SSEMCPClient) sendRequest(
defer resp.Body.Close()

if resp.StatusCode != http.StatusOK &&
resp.StatusCode != http.StatusAccepted {
resp.StatusCode != http.StatusAccepted &&
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The sse handling has been moved to a separate transport in the transport dir. Could you pull in the latest changes and add your fix here

if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {

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