net/http: various small cleanups

* Remove an unnecessary type conversion
* Make golint happier about consistent receiver names
* Make golint happier about a foo_bar var name

Change-Id: I5223808109f6f8b69ed4be76de82faf2478c6a2e
Reviewed-on: https://go-review.googlesource.com/54530
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tom Bergan <tombergan@google.com>

src/net/http/fs.go

@@ -317,7 +317,7 @@ func scanETag(s string) (etag string, remain string) {
 		// Character values allowed in ETags.
 		case c == 0x21 || c >= 0x23 && c <= 0x7E || c >= 0x80:
 		case c == '"':
-			return string(s[:i+1]), s[i+1:]
+			return s[:i+1], s[i+1:]
 		default:
 			return "", ""
 		}

src/net/http/request.go

@@ -490,8 +490,8 @@ var errMissingHost = errors.New("http: Request.Write on Request with no Host or
 
 // extraHeaders may be nil
 // waitForContinue may be nil
-func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, waitForContinue func() bool) (err error) {
-	trace := httptrace.ContextClientTrace(req.Context())
+func (r *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, waitForContinue func() bool) (err error) {
+	trace := httptrace.ContextClientTrace(r.Context())
 	if trace != nil && trace.WroteRequest != nil {
 		defer func() {
 			trace.WroteRequest(httptrace.WroteRequestInfo{
@@ -504,12 +504,12 @@ func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, wai
 	// is not given, use the host from the request URL.
 	//
 	// Clean the host, in case it arrives with unexpected stuff in it.
-	host := cleanHost(req.Host)
+	host := cleanHost(r.Host)
 	if host == "" {
-		if req.URL == nil {
+		if r.URL == nil {
 			return errMissingHost
 		}
-		host = cleanHost(req.URL.Host)
+		host = cleanHost(r.URL.Host)
 	}
 
 	// According to RFC 6874, an HTTP client, proxy, or other
@@ -517,10 +517,10 @@ func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, wai
 	// to an outgoing URI.
 	host = removeZone(host)
 
-	ruri := req.URL.RequestURI()
-	if usingProxy && req.URL.Scheme != "" && req.URL.Opaque == "" {
-		ruri = req.URL.Scheme + "://" + host + ruri
-	} else if req.Method == "CONNECT" && req.URL.Path == "" {
+	ruri := r.URL.RequestURI()
+	if usingProxy && r.URL.Scheme != "" && r.URL.Opaque == "" {
+		ruri = r.URL.Scheme + "://" + host + ruri
+	} else if r.Method == "CONNECT" && r.URL.Path == "" {
 		// CONNECT requests normally give just the host and port, not a full URL.
 		ruri = host
 	}
@@ -536,7 +536,7 @@ func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, wai
 		w = bw
 	}
 
-	_, err = fmt.Fprintf(w, "%s %s HTTP/1.1\r\n", valueOrDefault(req.Method, "GET"), ruri)
+	_, err = fmt.Fprintf(w, "%s %s HTTP/1.1\r\n", valueOrDefault(r.Method, "GET"), ruri)
 	if err != nil {
 		return err
 	}
@@ -550,8 +550,8 @@ func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, wai
 	// Use the defaultUserAgent unless the Header contains one, which
 	// may be blank to not send the header.
 	userAgent := defaultUserAgent
-	if _, ok := req.Header["User-Agent"]; ok {
-		userAgent = req.Header.Get("User-Agent")
+	if _, ok := r.Header["User-Agent"]; ok {
+		userAgent = r.Header.Get("User-Agent")
 	}
 	if userAgent != "" {
 		_, err = fmt.Fprintf(w, "User-Agent: %s\r\n", userAgent)
@@ -561,7 +561,7 @@ func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, wai
 	}
 
 	// Process Body,ContentLength,Close,Trailer
-	tw, err := newTransferWriter(req)
+	tw, err := newTransferWriter(r)
 	if err != nil {
 		return err
 	}
@@ -570,7 +570,7 @@ func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, wai
 		return err
 	}
 
-	err = req.Header.WriteSubset(w, reqWriteExcludeHeader)
+	err = r.Header.WriteSubset(w, reqWriteExcludeHeader)
 	if err != nil {
 		return err
 	}
@@ -603,7 +603,7 @@ func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, wai
 			trace.Wait100Continue()
 		}
 		if !waitForContinue() {
-			req.closeBody()
+			r.closeBody()
 			return nil
 		}
 	}

src/net/http/transfer.go

@@ -663,9 +663,8 @@ func fixLength(isResponse bool, status int, requestMethod string, header Header,
 			return -1, err
 		}
 		return n, nil
-	} else {
-		header.Del("Content-Length")
 	}
+	header.Del("Content-Length")
 
 	if isRequest {
 		// RFC 2616 neither explicitly permits nor forbids an

src/net/http/transport.go

@@ -1224,8 +1224,8 @@ func useProxy(addr string) bool {
 		}
 	}
 
-	no_proxy := noProxyEnv.Get()
-	if no_proxy == "*" {
+	noProxy := noProxyEnv.Get()
+	if noProxy == "*" {
 		return false
 	}
 
@@ -1234,7 +1234,7 @@ func useProxy(addr string) bool {
 		addr = addr[:strings.LastIndex(addr, ":")]
 	}
 
-	for _, p := range strings.Split(no_proxy, ",") {
+	for _, p := range strings.Split(noProxy, ",") {
 		p = strings.ToLower(strings.TrimSpace(p))
 		if len(p) == 0 {
 			continue
@@ -2021,8 +2021,8 @@ func (pc *persistConn) roundTrip(req *transportRequest) (resp *Response, err err
 // a t.Logf func. See export_test.go's Request.WithT method.
 type tLogKey struct{}
 
-func (r *transportRequest) logf(format string, args ...interface{}) {
-	if logf, ok := r.Request.Context().Value(tLogKey{}).(func(string, ...interface{})); ok {
+func (tr *transportRequest) logf(format string, args ...interface{}) {
+	if logf, ok := tr.Request.Context().Value(tLogKey{}).(func(string, ...interface{})); ok {
 		logf(time.Now().Format(time.RFC3339Nano)+": "+format, args...)
 	}
 }