mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-21 07:56:26 +01:00
124 lines
3.6 KiB
Go
124 lines
3.6 KiB
Go
package httpbinding
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
const (
|
|
contentLengthHeader = "Content-Length"
|
|
floatNaN = "NaN"
|
|
floatInfinity = "Infinity"
|
|
floatNegInfinity = "-Infinity"
|
|
)
|
|
|
|
// An Encoder provides encoding of REST URI path, query, and header components
|
|
// of an HTTP request. Can also encode a stream as the payload.
|
|
//
|
|
// Does not support SetFields.
|
|
type Encoder struct {
|
|
path, rawPath, pathBuffer []byte
|
|
|
|
query url.Values
|
|
header http.Header
|
|
}
|
|
|
|
// NewEncoder creates a new encoder from the passed in request. It assumes that
|
|
// raw path contains no valuable information at this point, so it passes in path
|
|
// as path and raw path for subsequent trans
|
|
func NewEncoder(path, query string, headers http.Header) (*Encoder, error) {
|
|
return NewEncoderWithRawPath(path, path, query, headers)
|
|
}
|
|
|
|
// NewHTTPBindingEncoder creates a new encoder from the passed in request. All query and
|
|
// header values will be added on top of the request's existing values. Overwriting
|
|
// duplicate values.
|
|
func NewEncoderWithRawPath(path, rawPath, query string, headers http.Header) (*Encoder, error) {
|
|
parseQuery, err := url.ParseQuery(query)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to parse query string: %w", err)
|
|
}
|
|
|
|
e := &Encoder{
|
|
path: []byte(path),
|
|
rawPath: []byte(rawPath),
|
|
query: parseQuery,
|
|
header: headers.Clone(),
|
|
}
|
|
|
|
return e, nil
|
|
}
|
|
|
|
// Encode returns a REST protocol encoder for encoding HTTP bindings.
|
|
//
|
|
// Due net/http requiring `Content-Length` to be specified on the http.Request#ContentLength directly. Encode
|
|
// will look for whether the header is present, and if so will remove it and set the respective value on http.Request.
|
|
//
|
|
// Returns any error occurring during encoding.
|
|
func (e *Encoder) Encode(req *http.Request) (*http.Request, error) {
|
|
req.URL.Path, req.URL.RawPath = string(e.path), string(e.rawPath)
|
|
req.URL.RawQuery = e.query.Encode()
|
|
|
|
// net/http ignores Content-Length header and requires it to be set on http.Request
|
|
if v := e.header.Get(contentLengthHeader); len(v) > 0 {
|
|
iv, err := strconv.ParseInt(v, 10, 64)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req.ContentLength = iv
|
|
e.header.Del(contentLengthHeader)
|
|
}
|
|
|
|
req.Header = e.header
|
|
|
|
return req, nil
|
|
}
|
|
|
|
// AddHeader returns a HeaderValue for appending to the given header name
|
|
func (e *Encoder) AddHeader(key string) HeaderValue {
|
|
return newHeaderValue(e.header, key, true)
|
|
}
|
|
|
|
// SetHeader returns a HeaderValue for setting the given header name
|
|
func (e *Encoder) SetHeader(key string) HeaderValue {
|
|
return newHeaderValue(e.header, key, false)
|
|
}
|
|
|
|
// Headers returns a Header used for encoding headers with the given prefix
|
|
func (e *Encoder) Headers(prefix string) Headers {
|
|
return Headers{
|
|
header: e.header,
|
|
prefix: strings.TrimSpace(prefix),
|
|
}
|
|
}
|
|
|
|
// HasHeader returns if a header with the key specified exists with one or
|
|
// more value.
|
|
func (e Encoder) HasHeader(key string) bool {
|
|
return len(e.header[key]) != 0
|
|
}
|
|
|
|
// SetURI returns a URIValue used for setting the given path key
|
|
func (e *Encoder) SetURI(key string) URIValue {
|
|
return newURIValue(&e.path, &e.rawPath, &e.pathBuffer, key)
|
|
}
|
|
|
|
// SetQuery returns a QueryValue used for setting the given query key
|
|
func (e *Encoder) SetQuery(key string) QueryValue {
|
|
return NewQueryValue(e.query, key, false)
|
|
}
|
|
|
|
// AddQuery returns a QueryValue used for appending the given query key
|
|
func (e *Encoder) AddQuery(key string) QueryValue {
|
|
return NewQueryValue(e.query, key, true)
|
|
}
|
|
|
|
// HasQuery returns if a query with the key specified exists with one or
|
|
// more values.
|
|
func (e *Encoder) HasQuery(key string) bool {
|
|
return len(e.query.Get(key)) != 0
|
|
}
|