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downloadProtocol: support multi-proxy environments with DownloadFile (#1230)

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* downloadProtocol: support multi-proxy environments with DownloadFile

* remove debugging lines

* update config tests

* download/mode: add tests for DownloadFile and friends

* add documentation to Download File
This commit is contained in:
Marwan Sulaiman
2019-06-08 00:30:07 -04:00
committed by GitHub
parent 5cec5f6366
commit 76fb786324
21 changed files with 587 additions and 74 deletions
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config.dev.toml
+26 -1
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@@ -81,7 +81,7 @@ Port = ":3000"
#
# To point Athens to an upstream proxy to fetch modules,
# set GlobalEndpoint to "https://<url_to_upstream>"
# and also ensure that FilterFile is set to a fully qualified file name
# and also ensure that FilterFile is set to a fully qualified file name
# that contains the letter `D` (for "Direct Access") in the first line.
GlobalEndpoint = "http://localhost:3001"
@@ -176,6 +176,31 @@ SumDBs = ["https://sum.golang.org"]
# Env override: ATHENS_GONOSUM_PATTERNS
NoSumPatterns = []
# DownloadMode defines how Athens behaves when a module@version
# is not found in storage. There are 4 options:
# 1. "sync" (default): download the module synchronously and
# return the results to the client.
# 2. "async": return 404, but asynchronously store the module
# in the storage backend.
# 3. "redirect": return a 301 redirect status to the client
# with the base URL as the DownloadRedirectURL from below.
# 4. "async_redirect": same as option number 3 but it will
# asynchronously store the module to the backend.
# 5. "none": return 404 if a module is not found and do nothing.
# 6. "file:<path>": will point to an HCL file that specifies
# any of the 5 options above based on different import paths.
# 7. "custom:<base64-encoded-hcl>" is the same as option 6
# but the file is fully encoded in the option. This is
# useful for using an environment variable in serverless
# deployments.
# Env override: ATHENS_DOWNLOAD_MODE
DownloadMode = "sync"
# DownloadURL is the URL that will be used if
# DownloadMode is set to "redirect"
# Env override: ATHENS_DOWNLOAD_URL
DownloadURL = ""
# SingleFlightType determines what mechanism Athens uses
# to manage concurrency flowing into the Athens Backend.
# This is important for the following scenario: if two concurrent requests