LiveSource: Refine fetch for external exposed interface.

[chundonglinlin]

LiveSource's fetch function should be extended Parameters, because it update the request.

[winlinvip]

This modification is the simplest, but it lacks maintainability and does not solve the fundamental problem.

Functions like fetch, which are similar to get, can never update.

Adding a parameter cannot solve this problem. Therefore, the fetch function should be separated into an API.

TRANS_BY_GPT3

[chundonglinlin]

Remove the update operation from fetch and place update in the corresponding position where the request needs to be updated, such as in fetch_or_create requiring an update to the request.

TRANS_BY_GPT3

[codecov-commenter]

Codecov Report

Merging #2873 (82bdfda) into 4.0release (c30aa47) will not change coverage.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           4.0release    #2873   +/-   ##
===========================================
  Coverage       60.22%   60.22%           
===========================================
  Files             121      121           
  Lines           51070    51070           
===========================================
  Hits            30756    30756           
  Misses          20314    20314           

| Impacted Files | Coverage Δ | |'

Translated to English while maintaining the markdown structure:

'| Impacted Files | Coverage Δ | |
|---|---|---|
| trunk/src/app/srs_app_rtc_source.cpp | 12.39% <0.00%> (ø) | |
| trunk/src/app/srs_app_rtc_source.hpp | 9.09% <ø> (ø) | |
| trunk/src/app/srs_app_source.cpp | 0.66% <0.00%> (ø) | |

'

Translated to English while maintaining the markdown structure:

'| trunk/src/app/srs_app_rtc_source.cpp | 12.39% <0.00%> (ø) | |
| trunk/src/app/srs_app_rtc_source.hpp | 9.09% <ø> (ø) | |
| trunk/src/app/srs_app_source.cpp | 0.66% <0.00%> (ø) | |

---

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| Δ = absolute <relative> (impact), ø = not affected, ? = missing data'

Translated to English while maintaining the markdown structure:

'| Δ = absolute <relative> (impact), ø = not affected, ? = missing data

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TRANS_BY_GPT3

[winlinvip]

NICE 👍