package util
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"github.com/ajg/form"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"strings"
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"github.com/dustin/go-humanize"
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)
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const (
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DATA_URL_PREFIX = "/data/api-v"
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CONTENT_TYPE_FORM = "application/x-www-form-urlencoded"
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CONTENT_TYPE_MULFORM = "multipart/form-data"
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CONTENT_TYPE_JSON = "application/json"
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)
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func DoPostRequest(url string, contentType string, body map[string]interface{}, params map[string]string, headers map[string]string) ([]byte, error) {
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var resultBytes []byte
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var request *http.Request
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var err error
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if contentType == CONTENT_TYPE_FORM || contentType == CONTENT_TYPE_MULFORM {
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formData, err := form.EncodeToString(body)
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if err != nil {
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return resultBytes, err
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}
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request, err = http.NewRequest("POST", url, strings.NewReader(formData))
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if err != nil {
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return resultBytes, err
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}
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} else {
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var bodyJson []byte
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if body != nil {
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var err error
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bodyJson, err = json.Marshal(body)
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if err != nil {
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return resultBytes, err
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}
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}
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request, err = http.NewRequest("POST", url, bytes.NewBuffer(bodyJson))
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if err != nil {
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return resultBytes, err
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}
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}
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request.Header.Set("Content-type", contentType)
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//add params
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q := request.URL.Query()
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if params != nil {
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for key, val := range params {
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q.Add(key, val)
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}
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request.URL.RawQuery = q.Encode()
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}
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// add headers
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if headers != nil {
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for key, val := range headers {
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request.Header.Add(key, val)
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}
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}
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client := &http.Client{}
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resp, err := client.Do(request)
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if err != nil {
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return resultBytes, err
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}
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defer resp.Body.Close()
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resultBytes, err = ioutil.ReadAll(resp.Body)
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if err != nil {
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return resultBytes, err
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}
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return resultBytes, nil
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}
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type WriteCounter struct {
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Total uint64
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}
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func (wc WriteCounter) PrintProgress() {
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fmt.Printf("\r%s", strings.Repeat(" ", 35))
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fmt.Printf("/rDownloading... %s complete", humanize.Bytes(wc.Total))
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}
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func (wc *WriteCounter) Write(p []byte) (int, error) {
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n := len(p)
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wc.Total = uint64(n)
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wc.PrintProgress()
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return n, nil
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}
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//下载文件
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func DownloadFile(fPath string, url string) error {
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f, err := os.Create(fPath)
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if err != nil {
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return err
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}
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resp, err := http.Get(url)
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if err != nil {
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f.Close()
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return err
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}
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defer resp.Body.Close()
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counter := &WriteCounter{}
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if _, err = io.Copy(f, io.TeeReader(resp.Body, counter)); err != nil {
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f.Close()
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return err
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}
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fmt.Printf("\n")
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f.Close()
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if err = os.Rename(fPath, fPath);err != nil {
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return err
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}
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return nil
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}
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