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add ability to drop incoming headers #108

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In some cases proxy should sanitize incoming headers. --drop-header and $DROP_HEADERS set list of headers (keys) and those headers removed from the request.
This commit is contained in:
Umputun
2021-09-11 14:38:56 -05:00
parent f908fa6fe5
commit 76fa56777f
7 changed files with 42 additions and 23 deletions
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25
app/proxy/proxy.go
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@@ -32,6 +32,7 @@ type Http struct { // nolint golint
MaxBodySize int64
GzEnabled bool
ProxyHeaders []string
DropHeader []string
SSLConfig SSLConfig
Version string
AccessLog io.Writer
@@ -45,7 +46,7 @@ type Http struct { // nolint golint
LBSelector func(len int) int
ThrottleSystem int
ThottleUser int
ThrottleUser int
}
// Matcher source info (server and route) to the destination url
@@ -110,17 +111,17 @@ func (h *Http) Run(ctx context.Context) error {
}()
handler := R.Wrap(h.proxyHandler(),
R.Recoverer(log.Default()), // recover on errors
signatureHandler(h.Signature, h.Version), // send app signature
h.pingHandler, // respond to /ping
h.healthMiddleware, // respond to /health
h.matchHandler, // set matched routes to context
limiterSystemHandler(h.ThrottleSystem), // limit total requests/sec
limiterUserHandler(h.ThottleUser), // req/seq per user/route match
h.mgmtHandler(), // handles /metrics and /routes for prometheus
h.pluginHandler(), // prc to external plugins
headersHandler(h.ProxyHeaders), // set response headers
accessLogHandler(h.AccessLog), // apache-format log file
R.Recoverer(log.Default()), // recover on errors
signatureHandler(h.Signature, h.Version), // send app signature
h.pingHandler, // respond to /ping
h.healthMiddleware, // respond to /health
h.matchHandler, // set matched routes to context
limiterSystemHandler(h.ThrottleSystem), // limit total requests/sec
limiterUserHandler(h.ThrottleUser), // req/seq per user/route match
h.mgmtHandler(), // handles /metrics and /routes for prometheus
h.pluginHandler(), // prc to external plugins
headersHandler(h.ProxyHeaders, h.DropHeader), // add response headers and delete some request headers
accessLogHandler(h.AccessLog), // apache-format log file
stdoutLogHandler(h.StdOutEnabled, logger.New(logger.Log(log.Default()), logger.Prefix("[INFO]")).Handler),
maxReqSizeHandler(h.MaxBodySize), // limit request max size
gzipHandler(h.GzEnabled), // gzip response