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transport_headers.go
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/
transport_headers.go
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package httputilmore
import (
"net/http"
"net/url"
)
// TransportRequestModifier implements http.RoundTripper.
// When set as Transport of http.Client, it adds HTTP headers and or query
// string parameters to requests.
// No field is mandatory. Can be implemented with http.Client as:
// client.Transport = httputilmore.TransportRequestModifier{
// Transport:client.Transport, Header:myHeader}
type TransportRequestModifier struct {
Transport http.RoundTripper
Header http.Header
Query url.Values
Override bool
}
// RoundTrip adds the additional headers per request implements http.RoundTripper.
func (t TransportRequestModifier) RoundTrip(req *http.Request) (*http.Response, error) {
req.Header = MergeHeader(req.Header, t.Header, t.Override)
if len(t.Query) > 0 {
q := req.URL.Query()
for k, vals := range t.Query {
for _, v := range vals {
if t.Override || len(q.Get(k)) == 0 {
q.Add(k, v)
}
}
}
req.URL.RawQuery = q.Encode()
}
return t.transport().RoundTrip(req)
}
func (t TransportRequestModifier) transport() http.RoundTripper {
if t.Transport != nil {
return t.Transport
}
return http.DefaultTransport
}