289b30715d
This commit converts the dependency management from Godeps to the vendor folder, also switching the tool from godep to trash. Since the upstream tool lacks a few features proposed via a few PRs, until those PRs are merged in (if), use github.com/karalabe/trash. You can update dependencies via trash --update. All dependencies have been updated to their latest version. Parts of the build system are reworked to drop old notions of Godeps and invocation of the go vet command so that it doesn't run against the vendor folder, as that will just blow up during vetting. The conversion drops OpenCL (and hence GPU mining support) from ethash and our codebase. The short reasoning is that there's noone to maintain and having opencl libs in our deps messes up builds as go install ./... tries to build them, failing with unsatisfied link errors for the C OpenCL deps. golang.org/x/net/context is not vendored in. We expect it to be fetched by the user (i.e. using go get). To keep ci.go builds reproducible the package is "vendored" in build/_vendor.
60 lines
1.7 KiB
Go
60 lines
1.7 KiB
Go
package xhandler
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import (
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"net/http"
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"time"
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"golang.org/x/net/context"
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)
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// CloseHandler returns a Handler, cancelling the context when the client
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// connection closes unexpectedly.
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func CloseHandler(next HandlerC) HandlerC {
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return HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
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// Cancel the context if the client closes the connection
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if wcn, ok := w.(http.CloseNotifier); ok {
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var cancel context.CancelFunc
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ctx, cancel = context.WithCancel(ctx)
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defer cancel()
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notify := wcn.CloseNotify()
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go func() {
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select {
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case <-notify:
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cancel()
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case <-ctx.Done():
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}
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}()
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}
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next.ServeHTTPC(ctx, w, r)
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})
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}
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// TimeoutHandler returns a Handler which adds a timeout to the context.
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//
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// Child handlers have the responsability of obeying the context deadline and to return
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// an appropriate error (or not) response in case of timeout.
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func TimeoutHandler(timeout time.Duration) func(next HandlerC) HandlerC {
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return func(next HandlerC) HandlerC {
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return HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
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ctx, _ = context.WithTimeout(ctx, timeout)
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next.ServeHTTPC(ctx, w, r)
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})
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}
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}
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// If is a special handler that will skip insert the condNext handler only if a condition
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// applies at runtime.
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func If(cond func(ctx context.Context, w http.ResponseWriter, r *http.Request) bool, condNext func(next HandlerC) HandlerC) func(next HandlerC) HandlerC {
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return func(next HandlerC) HandlerC {
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return HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
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if cond(ctx, w, r) {
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condNext(next).ServeHTTPC(ctx, w, r)
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} else {
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next.ServeHTTPC(ctx, w, r)
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}
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})
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}
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}
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