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package js
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strings"
"github.com/robertkrimen/otto"
)
type httpPackage struct {
}
type httpResponse struct {
Error error
Response *http.Response
Raw []byte
Body string
JSON interface{}
}
func (c httpPackage) Encode(s string) string {
return url.QueryEscape(s)
}
func (c httpPackage) Request(method string, uri string,
headers map[string]string,
form map[string]string,
json string) httpResponse {
var reader io.Reader
if form != nil {
data := url.Values{}
for k, v := range form {
data.Set(k, v)
}
reader = bytes.NewBufferString(data.Encode())
} else if json != "" {
reader = strings.NewReader(json)
}
req, err := http.NewRequest(method, uri, reader)
if err != nil {
return httpResponse{Error: err}
}
if form != nil {
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
} else if json != "" {
req.Header.Set("Content-Type", "application/json")
}
for name, value := range headers {
req.Header.Add(name, value)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return httpResponse{Error: err}
}
defer resp.Body.Close()
raw, err := ioutil.ReadAll(resp.Body)
if err != nil {
return httpResponse{Error: err}
}
res := httpResponse{
Response: resp,
Raw: raw,
Body: string(raw),
}
if resp.StatusCode != http.StatusOK {
res.Error = fmt.Errorf("%s", resp.Status)
}
return res
}
func (c httpPackage) Get(url string, headers map[string]string) httpResponse {
return c.Request("GET", url, headers, nil, "")
}
func (c httpPackage) PostForm(url string, headers map[string]string, form map[string]string) httpResponse {
return c.Request("POST", url, headers, form, "")
}
func (c httpPackage) PostJSON(url string, headers map[string]string, json string) httpResponse {
return c.Request("POST", url, headers, nil, json)
}
func httpRequest(call otto.FunctionCall) otto.Value {
argv := call.ArgumentList
argc := len(argv)
if argc < 2 {
return ReportError("httpRequest: expected 2 or more, %d given instead.", argc)
}
method := argv[0].String()
url := argv[1].String()
client := &http.Client{}
req, err := http.NewRequest(method, url, nil)
if argc >= 3 {
data := argv[2].String()
req, err = http.NewRequest(method, url, bytes.NewBuffer([]byte(data)))
if err != nil {
return ReportError("Could create request to url %s: %s", url, err)
}
if argc > 3 {
headers := argv[3].Object()
for _, key := range headers.Keys() {
v, err := headers.Get(key)
if err != nil {
return ReportError("Could add header %s to request: %s", key, err)
}
req.Header.Add(key, v.String())
}
}
} else if err != nil {
return ReportError("Could create request to url %s: %s", url, err)
}
resp, err := client.Do(req)
if err != nil {
return ReportError("Could not request url %s: %s", url, err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return ReportError("Could not read response: %s", err)
}
object, err := otto.New().Object("({})")
if err != nil {
return ReportError("Could not create response object: %s", err)
}
err = object.Set("body", string(body))
if err != nil {
return ReportError("Could not populate response object: %s", err)
}
v, err := otto.ToValue(object)
if err != nil {
return ReportError("Could not convert to object: %s", err)
}
return v
}
|
