88 lines
1.8 KiB
Go
88 lines
1.8 KiB
Go
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package http
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import (
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"bufio"
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"errors"
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"fmt"
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"io"
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"net"
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"strconv"
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"strings"
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)
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func Do(method string, url string) (*Response, error) {
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path := "/"
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arr := strings.Split(url, "/")
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if len(arr) == 2 {
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path = arr[1]
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}
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if !strings.HasPrefix(path, "/") {
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path = "/" + path
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}
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conn, err := net.Dial("tcp", arr[0])
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if err != nil {
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return nil, errors.New("connect " + arr[0])
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}
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defer conn.Close()
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WriteRequest(conn, method, path, "HTTP/1.0")
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return ReadResponse(conn)
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}
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func WriteRequest(w io.Writer, method string, path string, httpVersion string) {
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fmt.Fprintf(w, "%s %s %s\r\n\r\n", method, path, httpVersion)
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}
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func ReadResponse(r io.Reader) (*Response, error) {
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response := &Response{}
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b := bufio.NewReader(r)
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status, err := b.ReadString('\n')
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if err != nil {
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return response, errors.New("read status")
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}
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arr := strings.Split(status, " ")
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response.StatusCode, err = strconv.Atoi(arr[1])
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if err != nil {
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return response, errors.New("read status code")
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}
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headerStr := ""
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for {
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headerStr, err = b.ReadString('\n')
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if err != nil {
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return response, errors.New("read header")
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}
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if headerStr == "\r\n" {
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break
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}
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arr := strings.Split(headerStr, ": ")
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value := strings.TrimSpace(arr[1])
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response.Headers = append(response.Headers, &Header{Name: arr[0], Value: value})
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}
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contentTypeHeader, err := response.GetHeader("Content-Length")
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if err != nil {
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return response, errors.New("get Content-Length")
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}
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length, err := strconv.Atoi(contentTypeHeader.Value)
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if err != nil {
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return response, errors.New("read Content-Length")
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}
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body := make([]byte, 0, length)
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for i := 0; i < length; i++ {
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r, err := b.ReadByte()
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if err != nil {
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return response, errors.New("read body")
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}
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body = append(body, r)
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}
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response.Body = body
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return response, nil
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}
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