9f82b75e57
* removed packer.Cache and references since packer.Cache is never used except in the download step. The download step now uses the new func packer.CachePath(targetPath) for this, the behavior is the same. * removed download code from packer that was reimplemented into the go-getter library: progress bar, http download restart, checksuming from file, skip already downloaded files, symlinking, make a download cancellable by context. * on windows if packer is running without symlinking rights and we are getting a local file, the file will be copied instead to avoid errors. * added unit tests for step_download that are now CI tested on windows, mac & linux. * files are now downloaded under cache dir `sha1(filename + "?checksum=" + checksum) + file_extension` * since the output dir is based on the source url and the checksum, when the checksum fails, the file is auto deleted. * a download file is protected and locked by a file lock, * updated docs * updated go modules and vendors |
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| .. | ||
| .gitignore | ||
| .travis.yml | ||
| LICENSE | ||
| Makefile | ||
| README.md | ||
| client.go | ||
README.md
go-retryablehttp
The retryablehttp package provides a familiar HTTP client interface with
automatic retries and exponential backoff. It is a thin wrapper over the
standard net/http client library and exposes nearly the same public API. This
makes retryablehttp very easy to drop into existing programs.
retryablehttp performs automatic retries under certain conditions. Mainly, if
an error is returned by the client (connection errors, etc.), or if a 500-range
response code is received (except 501), then a retry is invoked after a wait
period. Otherwise, the response is returned and left to the caller to
interpret.
The main difference from net/http is that requests which take a request body
(POST/PUT et. al) can have the body provided in a number of ways (some more or
less efficient) that allow "rewinding" the request body if the initial request
fails so that the full request can be attempted again. See the
godoc for more
details.
Example Use
Using this library should look almost identical to what you would do with
net/http. The most simple example of a GET request is shown below:
resp, err := retryablehttp.Get("/foo")
if err != nil {
panic(err)
}
The returned response object is an *http.Response, the same thing you would
usually get from net/http. Had the request failed one or more times, the above
call would block and retry with exponential backoff.
For more usage and examples see the godoc.