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// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package app
import (
"crypto/tls"
"io"
"io/ioutil"
"net/http"
"regexp"
"strings"
l4g "github.com/alecthomas/log4go"
"github.com/mattermost/platform/model"
"github.com/mattermost/platform/utils"
)
const (
TRIGGERWORDS_FULL = 0
TRIGGERWORDS_STARTSWITH = 1
)
func handleWebhookEvents(post *model.Post, team *model.Team, channel *model.Channel, user *model.User) *model.AppError {
if !utils.Cfg.ServiceSettings.EnableOutgoingWebhooks {
return nil
}
if channel.Type != model.CHANNEL_OPEN {
return nil
}
hchan := Srv.Store.Webhook().GetOutgoingByTeam(team.Id)
result := <-hchan
if result.Err != nil {
return result.Err
}
hooks := result.Data.([]*model.OutgoingWebhook)
if len(hooks) == 0 {
return nil
}
splitWords := strings.Fields(post.Message)
if len(splitWords) == 0 {
return nil
}
firstWord := splitWords[0]
relevantHooks := []*model.OutgoingWebhook{}
for _, hook := range hooks {
if hook.ChannelId == post.ChannelId || len(hook.ChannelId) == 0 {
if hook.ChannelId == post.ChannelId && len(hook.TriggerWords) == 0 {
relevantHooks = append(relevantHooks, hook)
} else if hook.TriggerWhen == TRIGGERWORDS_FULL && hook.HasTriggerWord(firstWord) {
relevantHooks = append(relevantHooks, hook)
} else if hook.TriggerWhen == TRIGGERWORDS_STARTSWITH && hook.TriggerWordStartsWith(firstWord) {
relevantHooks = append(relevantHooks, hook)
}
}
}
for _, hook := range relevantHooks {
go func(hook *model.OutgoingWebhook) {
payload := &model.OutgoingWebhookPayload{
Token: hook.Token,
TeamId: hook.TeamId,
TeamDomain: team.Name,
ChannelId: post.ChannelId,
ChannelName: channel.Name,
Timestamp: post.CreateAt,
UserId: post.UserId,
UserName: user.Username,
PostId: post.Id,
Text: post.Message,
TriggerWord: firstWord,
}
var body io.Reader
var contentType string
if hook.ContentType == "application/json" {
body = strings.NewReader(payload.ToJSON())
contentType = "application/json"
} else {
body = strings.NewReader(payload.ToFormValues())
contentType = "application/x-www-form-urlencoded"
}
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: *utils.Cfg.ServiceSettings.EnableInsecureOutgoingConnections},
}
client := &http.Client{Transport: tr}
for _, url := range hook.CallbackURLs {
go func(url string) {
req, _ := http.NewRequest("POST", url, body)
req.Header.Set("Content-Type", contentType)
req.Header.Set("Accept", "application/json")
if resp, err := client.Do(req); err != nil {
l4g.Error(utils.T("api.post.handle_webhook_events_and_forget.event_post.error"), err.Error())
} else {
defer func() {
ioutil.ReadAll(resp.Body)
resp.Body.Close()
}()
respProps := model.MapFromJson(resp.Body)
if text, ok := respProps["text"]; ok {
if _, err := CreateWebhookPost(hook.CreatorId, hook.TeamId, post.ChannelId, text, respProps["username"], respProps["icon_url"], post.Props, post.Type); err != nil {
l4g.Error(utils.T("api.post.handle_webhook_events_and_forget.create_post.error"), err)
}
}
}
}(url)
}
}(hook)
}
return nil
}
func CreateWebhookPost(userId, teamId, channelId, text, overrideUsername, overrideIconUrl string, props model.StringInterface, postType string) (*model.Post, *model.AppError) {
// parse links into Markdown format
linkWithTextRegex := regexp.MustCompile(`<([^<\|]+)\|([^>]+)>`)
text = linkWithTextRegex.ReplaceAllString(text, "[${2}](${1})")
post := &model.Post{UserId: userId, ChannelId: channelId, Message: text, Type: postType}
post.AddProp("from_webhook", "true")
if utils.Cfg.ServiceSettings.EnablePostUsernameOverride {
if len(overrideUsername) != 0 {
post.AddProp("override_username", overrideUsername)
} else {
post.AddProp("override_username", model.DEFAULT_WEBHOOK_USERNAME)
}
}
if utils.Cfg.ServiceSettings.EnablePostIconOverride {
if len(overrideIconUrl) != 0 {
post.AddProp("override_icon_url", overrideIconUrl)
}
}
if len(props) > 0 {
for key, val := range props {
if key == "attachments" {
if list, success := val.([]interface{}); success {
// parse attachment links into Markdown format
for i, aInt := range list {
attachment := aInt.(map[string]interface{})
if aText, ok := attachment["text"].(string); ok {
aText = linkWithTextRegex.ReplaceAllString(aText, "[${2}](${1})")
attachment["text"] = aText
list[i] = attachment
}
if aText, ok := attachment["pretext"].(string); ok {
aText = linkWithTextRegex.ReplaceAllString(aText, "[${2}](${1})")
attachment["pretext"] = aText
list[i] = attachment
}
if fVal, ok := attachment["fields"]; ok {
if fields, ok := fVal.([]interface{}); ok {
// parse attachment field links into Markdown format
for j, fInt := range fields {
field := fInt.(map[string]interface{})
if fValue, ok := field["value"].(string); ok {
fValue = linkWithTextRegex.ReplaceAllString(fValue, "[${2}](${1})")
field["value"] = fValue
fields[j] = field
}
}
attachment["fields"] = fields
list[i] = attachment
}
}
}
post.AddProp(key, list)
}
} else if key != "override_icon_url" && key != "override_username" && key != "from_webhook" {
post.AddProp(key, val)
}
}
}
if _, err := CreatePost(post, teamId, false); err != nil {
return nil, model.NewLocAppError("CreateWebhookPost", "api.post.create_webhook_post.creating.app_error", nil, "err="+err.Message)
}
return post, nil
}
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