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go fmt whole project.
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parent
c7a178e5a4
commit
f85d4d312f
14 changed files with 177 additions and 180 deletions
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@ -1,14 +1,14 @@
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package middleware
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import (
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"context"
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"crypto/rand"
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"encoding/base64"
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"fmt"
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"net/http"
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"os"
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"strings"
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"sync/atomic"
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"context"
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"crypto/rand"
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"encoding/base64"
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"fmt"
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"net/http"
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"os"
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"strings"
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"sync/atomic"
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)
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// Key to use when setting the request ID.
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@ -37,19 +37,19 @@ var reqid uint64
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// than a millionth of a percent chance of generating two colliding IDs.
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func init() {
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hostname, err := os.Hostname()
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if hostname == "" || err != nil {
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hostname = "localhost"
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}
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var buf [12]byte
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var b64 string
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for len(b64) < 10 {
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rand.Read(buf[:])
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b64 = base64.StdEncoding.EncodeToString(buf[:])
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b64 = strings.NewReplacer("+", "", "/", "").Replace(b64)
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}
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hostname, err := os.Hostname()
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if hostname == "" || err != nil {
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hostname = "localhost"
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}
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var buf [12]byte
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var b64 string
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for len(b64) < 10 {
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rand.Read(buf[:])
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b64 = base64.StdEncoding.EncodeToString(buf[:])
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b64 = strings.NewReplacer("+", "", "/", "").Replace(b64)
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}
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prefix = fmt.Sprintf("%s/%s", hostname, b64[0:10])
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prefix = fmt.Sprintf("%s/%s", hostname, b64[0:10])
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}
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// RequestID is a middleware that injects a request ID into the context of each
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@ -58,32 +58,32 @@ func init() {
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// process, and where the last number is an atomically incremented request
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// counter.
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func RequestID(next http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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requestID := r.Header.Get("X-Request-Id")
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if requestID == "" {
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myid := atomic.AddUint64(&reqid, 1)
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requestID = fmt.Sprintf("%s-%06d", prefix, myid)
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}
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ctx = context.WithValue(ctx, RequestIDKey, requestID)
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next.ServeHTTP(w, r.WithContext(ctx))
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}
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return http.HandlerFunc(fn)
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fn := func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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requestID := r.Header.Get("X-Request-Id")
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if requestID == "" {
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myid := atomic.AddUint64(&reqid, 1)
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requestID = fmt.Sprintf("%s-%06d", prefix, myid)
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}
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ctx = context.WithValue(ctx, RequestIDKey, requestID)
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next.ServeHTTP(w, r.WithContext(ctx))
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}
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return http.HandlerFunc(fn)
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}
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// GetReqID returns a request ID from the given context if one is present.
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// Returns the empty string if a request ID cannot be found.
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func GetReqID(ctx context.Context) string {
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if ctx == nil {
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return ""
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}
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if reqID, ok := ctx.Value(RequestIDKey).(string); ok {
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return reqID
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}
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return ""
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if ctx == nil {
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return ""
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}
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if reqID, ok := ctx.Value(RequestIDKey).(string); ok {
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return reqID
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}
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return ""
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}
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// NextRequestID generates the next request ID in the sequence.
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func NextRequestID() uint64 {
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return atomic.AddUint64(&reqid, 1)
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return atomic.AddUint64(&reqid, 1)
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}
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