Added all required dependencies

vendor/github.com/Unknwon/com/http.go

@@ -0,0 +1,201 @@
+// Copyright 2013 com authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package com
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path"
+)
+
+type NotFoundError struct {
+	Message string
+}
+
+func (e NotFoundError) Error() string {
+	return e.Message
+}
+
+type RemoteError struct {
+	Host string
+	Err  error
+}
+
+func (e *RemoteError) Error() string {
+	return e.Err.Error()
+}
+
+var UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1541.0 Safari/537.36"
+
+// HttpCall makes HTTP method call.
+func HttpCall(client *http.Client, method, url string, header http.Header, body io.Reader) (io.ReadCloser, error) {
+	req, err := http.NewRequest(method, url, body)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("User-Agent", UserAgent)
+	for k, vs := range header {
+		req.Header[k] = vs
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	if resp.StatusCode == 200 {
+		return resp.Body, nil
+	}
+	resp.Body.Close()
+	if resp.StatusCode == 404 { // 403 can be rate limit error.  || resp.StatusCode == 403 {
+		err = fmt.Errorf("resource not found: %s", url)
+	} else {
+		err = fmt.Errorf("%s %s -> %d", method, url, resp.StatusCode)
+	}
+	return nil, err
+}
+
+// HttpGet gets the specified resource.
+// ErrNotFound is returned if the server responds with status 404.
+func HttpGet(client *http.Client, url string, header http.Header) (io.ReadCloser, error) {
+	return HttpCall(client, "GET", url, header, nil)
+}
+
+// HttpPost posts the specified resource.
+// ErrNotFound is returned if the server responds with status 404.
+func HttpPost(client *http.Client, url string, header http.Header, body []byte) (io.ReadCloser, error) {
+	return HttpCall(client, "POST", url, header, bytes.NewBuffer(body))
+}
+
+// HttpGetToFile gets the specified resource and writes to file.
+// ErrNotFound is returned if the server responds with status 404.
+func HttpGetToFile(client *http.Client, url string, header http.Header, fileName string) error {
+	rc, err := HttpGet(client, url, header)
+	if err != nil {
+		return err
+	}
+	defer rc.Close()
+
+	os.MkdirAll(path.Dir(fileName), os.ModePerm)
+	f, err := os.Create(fileName)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	_, err = io.Copy(f, rc)
+	return err
+}
+
+// HttpGetBytes gets the specified resource. ErrNotFound is returned if the server
+// responds with status 404.
+func HttpGetBytes(client *http.Client, url string, header http.Header) ([]byte, error) {
+	rc, err := HttpGet(client, url, header)
+	if err != nil {
+		return nil, err
+	}
+	defer rc.Close()
+	return ioutil.ReadAll(rc)
+}
+
+// HttpGetJSON gets the specified resource and mapping to struct.
+// ErrNotFound is returned if the server responds with status 404.
+func HttpGetJSON(client *http.Client, url string, v interface{}) error {
+	rc, err := HttpGet(client, url, nil)
+	if err != nil {
+		return err
+	}
+	defer rc.Close()
+	err = json.NewDecoder(rc).Decode(v)
+	if _, ok := err.(*json.SyntaxError); ok {
+		return fmt.Errorf("JSON syntax error at %s", url)
+	}
+	return nil
+}
+
+// HttpPostJSON posts the specified resource with struct values,
+// and maps results to struct.
+// ErrNotFound is returned if the server responds with status 404.
+func HttpPostJSON(client *http.Client, url string, body, v interface{}) error {
+	data, err := json.Marshal(body)
+	if err != nil {
+		return err
+	}
+	rc, err := HttpPost(client, url, http.Header{"content-type": []string{"application/json"}}, data)
+	if err != nil {
+		return err
+	}
+	defer rc.Close()
+	err = json.NewDecoder(rc).Decode(v)
+	if _, ok := err.(*json.SyntaxError); ok {
+		return fmt.Errorf("JSON syntax error at %s", url)
+	}
+	return nil
+}
+
+// A RawFile describes a file that can be downloaded.
+type RawFile interface {
+	Name() string
+	RawUrl() string
+	Data() []byte
+	SetData([]byte)
+}
+
+// FetchFiles fetches files specified by the rawURL field in parallel.
+func FetchFiles(client *http.Client, files []RawFile, header http.Header) error {
+	ch := make(chan error, len(files))
+	for i := range files {
+		go func(i int) {
+			p, err := HttpGetBytes(client, files[i].RawUrl(), nil)
+			if err != nil {
+				ch <- err
+				return
+			}
+			files[i].SetData(p)
+			ch <- nil
+		}(i)
+	}
+	for _ = range files {
+		if err := <-ch; err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// FetchFiles uses command `curl` to fetch files specified by the rawURL field in parallel.
+func FetchFilesCurl(files []RawFile, curlOptions ...string) error {
+	ch := make(chan error, len(files))
+	for i := range files {
+		go func(i int) {
+			stdout, _, err := ExecCmd("curl", append(curlOptions, files[i].RawUrl())...)
+			if err != nil {
+				ch <- err
+				return
+			}
+
+			files[i].SetData([]byte(stdout))
+			ch <- nil
+		}(i)
+	}
+	for _ = range files {
+		if err := <-ch; err != nil {
+			return err
+		}
+	}
+	return nil
+}