[Tile-serving] [openstreetmap/mod_tile] ensure that partial reads from recv don't trip up rendering (PR #469)

[Frederik Ramm]

It is not guaranteed that recv will always return the number of bytes you have asked for; it can return fewer bytes which should not be treated as an error. This is a rare issue but I have actually encountered it on a (virtualised) system. Review requested though - unsure if I have the logic watertight.
You can view, comment on, or merge this pull request online at:

  https://github.com/openstreetmap/mod_tile/pull/469

-- Commit Summary --

  * ensure that partial reads from recv don't trip up rendering

-- File Changes --

    M src/mod_tile.c (58)

-- Patch Links --

https://github.com/openstreetmap/mod_tile/pull/469.patch
https://github.com/openstreetmap/mod_tile/pull/469.diff

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