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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"go/ast"
)
var httpFinalURLFix = fix{
"httpfinalurl",
httpfinalurl,
`Adapt http Get calls to not have a finalURL result parameter.
http://codereview.appspot.com/4535056/
`,
}
func init() {
register(httpFinalURLFix)
}
func httpfinalurl(f *ast.File) bool {
if !imports(f, "http") {
return false
}
fixed := false
walk(f, func(n interface{}) {
// Fix up calls to http.Get.
//
// If they have blank identifiers, remove them:
// resp, _, err := http.Get(url)
// -> resp, err := http.Get(url)
//
// But if they're using the finalURL parameter, warn:
// resp, finalURL, err := http.Get(url)
as, ok := n.(*ast.AssignStmt)
if !ok || len(as.Lhs) != 3 || len(as.Rhs) != 1 {
return
}
if !isCall(as.Rhs[0], "http", "Get") {
return
}
if isBlank(as.Lhs[1]) {
as.Lhs = []ast.Expr{as.Lhs[0], as.Lhs[2]}
fixed = true
} else {
warn(as.Pos(), "call to http.Get records final URL")
}
})
return fixed
}
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