fix: HTTP handling for partial header reception

[gouravkrosx]

Related Issue

• Keploy HttpParser fails to handle when HTTP headers also come in chunks

Closes: #1346

Describe the changes you've made

• Our proxy operates as a TCP server rather than an HTTP server, making it possible for HTTP headers not to arrive in the first chunk. Our HTTP parser observed headers arriving in multiple chunks due to TCP fragmentation based on chunk length, especially when the sender buffer is smaller. I've implemented a fix to handle these header chunks until complete headers are received.

• I've refactored error handling, identifying cases where certain errors need to be propagated to the caller function.

• Addressed an issue with the HTTP mock response headers, where two content-length values were being received. Previously, the code used the add function, but it should use the set function of Headers. This has been corrected.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Please let us know if any test cases are added

Please describe the tests(if any). Provide instructions how its affecting the coverage.

• I've tested the changes with java and Golang applications.

Describe if there is any unusual behaviour of your code(Write NA if there isn't)

NA

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

Screenshots (if any)

Original	Updated
original screenshot	updated screenshot

[sweep-ai]

Apply Sweep Rules to your PR?

• Apply: All new business logic should have corresponding unit tests.
• Apply: Refactor large functions to be more modular.
• Apply: Add docstrings to all functions and file headers.

This is an automated message generated by Sweep AI.

[charankamarapu]

will review by EOD

[charankamarapu]

Please address the comments. Rest of the things looks good to me.

[charankamarapu]

Ship it!