add some customized tempfile code#294
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We are discussing allowing concurrent uploads for the same blob in buchgr#267. Part of the proposed new design involves using pseudo-randomly named temp files. Unfortunately, ioutil.TempFile creates files with more restrictive permissions than we want- 0600 before umask, whereas we want 0666 before umask. This code is an adapted version of the algorithm in ioutil.TempFile, refactored for our more narrow use case- in particular we skip the use of the pid in the seed, since our use case is single-process, and we don't bother re-seeding if we encounter lots of collisions (which is unlikely). (We do not use this code, yet.)
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We are discussing allowing concurrent uploads for the same blob in #267.
Part of the proposed new design involves using pseudo-randomly named temp files. Unfortunately, ioutil.TempFile creates files with more restrictive permissions than we want- 0600 before umask, whereas we want 0666 before umask.
This code is an adapted version of the algorithm in ioutil.TempFile, refactored for our more narrow use case- in particular we skip the use of the pid in the seed, since our use case is single-process, and we don't bother re-seeding if we encounter lots of collisions (which is unlikely).
(We do not use this code, yet.)