レガシーじゃない Slack API のたたきかた ref: http://qiita.com/isann_tech/items/d6574350d3b623fdc1f8

file0.txt

package main

import (
    "strings"
    "net/http"
    "net/url"
)

/*
    Slack にメッセージを送信します。
*/
func sendSlack(title, msg string) bool {
    requestUrl := "https://slack.com/api/chat.postMessage"
    postData := map[string]string{
        "token":   "xoxp-XXX-XXX-XXXXXX-XXXXXXXXX",
        "channel": "err_replication_bot",
        "text":    title + "\n```" + msg + "```",
    }
    _, err := requestHttp(requestUrl, "post", nil, postData, nil, "")
    if err != nil {
        return false
    }
    return true
}

func requestHttp(requestUrl string, method string, getParam map[string]string, postParam map[string]string, cookie *http.Cookie, userAgent string) (*http.Response, error) {
    var req *http.Request
    var err error
    if strings.ToLower(method) == "post" {
        values := url.Values{}
        if postParam != nil {
            for key, val := range postParam {
                values.Add(key, val)
            }
        }
        req, err = http.NewRequest("POST", requestUrl, strings.NewReader(values.Encode()))
        if err != nil {
            return nil, err
        }
    } else if strings.ToLower(method) == "get" {
        req, err = http.NewRequest("GET", requestUrl, nil)
        if err != nil {
            return nil, err
        }
    }
    // GET parameter
    if getParam != nil {
        values2 := url.Values{}
        for key, val := range getParam {
            values2.Add(key, val)
        }
        req.URL.RawQuery = values2.Encode()
    }
    // Request Header
    if strings.ToLower(method) == "post" {
        req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
    }
    if userAgent != "" {
        req.Header.Add("User-Agent", userAgent)
    } else {
        req.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; MAFSJS; rv:11.0) like Gecko")
    }
    if cookie != nil {
        req.AddCookie(cookie)
    }
    // 自動リダイレクトのオフ
    client := http.Client{
        // Go HTTP Client NOT Follow Redirects Automatically.
        CheckRedirect: func(req *http.Request, via []*http.Request) error {
            return http.ErrUseLastResponse
        },
    }
    return client.Do(req)
}