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handlers.go
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handlers.go
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package main
import (
"encoding/json"
"net/http"
"net/url"
"strconv"
"strings"
"github.com/asaskevich/govalidator"
"github.com/labstack/echo"
)
const (
// stdInputMaxLen is the maximum allowed length for a standard input field.
stdInputMaxLen = 200
// bodyMaxLen is the maximum allowed length for e-mail bodies.
bodyMaxLen = 1000000
// defaultPerPage is the default number of results returned in an GET call.
defaultPerPage = 20
// maxPerPage is the maximum number of allowed for paginated records.
maxPerPage = 100
)
type okResp struct {
Data interface{} `json:"data"`
}
// pagination represents a query's pagination (limit, offset) related values.
type pagination struct {
PerPage int `json:"per_page"`
Page int `json:"page"`
Offset int `json:"offset"`
Limit int `json:"limit"`
}
// registerHandlers registers HTTP handlers.
func registerHandlers(e *echo.Echo) {
e.GET("/", handleIndexPage)
e.GET("/api/config.js", handleGetConfigScript)
e.GET("/api/dashboard/stats", handleGetDashboardStats)
e.GET("/api/subscribers/:id", handleGetSubscriber)
e.POST("/api/subscribers", handleCreateSubscriber)
e.PUT("/api/subscribers/:id", handleUpdateSubscriber)
e.PUT("/api/subscribers/blacklist", handleBlacklistSubscribers)
e.PUT("/api/subscribers/:id/blacklist", handleBlacklistSubscribers)
e.PUT("/api/subscribers/lists/:id", handleManageSubscriberLists)
e.PUT("/api/subscribers/lists", handleManageSubscriberLists)
e.DELETE("/api/subscribers/:id", handleDeleteSubscribers)
e.DELETE("/api/subscribers", handleDeleteSubscribers)
// Subscriber operations based on arbitrary SQL queries.
// These aren't very REST-like.
e.POST("/api/subscribers/query/delete", handleDeleteSubscribersByQuery)
e.PUT("/api/subscribers/query/blacklist", handleBlacklistSubscribersByQuery)
e.PUT("/api/subscribers/query/lists", handleManageSubscriberListsByQuery)
e.GET("/api/subscribers", handleQuerySubscribers)
e.GET("/api/import/subscribers", handleGetImportSubscribers)
e.GET("/api/import/subscribers/logs", handleGetImportSubscriberStats)
e.POST("/api/import/subscribers", handleImportSubscribers)
e.DELETE("/api/import/subscribers", handleStopImportSubscribers)
e.GET("/api/lists", handleGetLists)
e.GET("/api/lists/:id", handleGetLists)
e.POST("/api/lists", handleCreateList)
e.PUT("/api/lists/:id", handleUpdateList)
e.DELETE("/api/lists/:id", handleDeleteLists)
e.GET("/api/campaigns", handleGetCampaigns)
e.GET("/api/campaigns/running/stats", handleGetRunningCampaignStats)
e.GET("/api/campaigns/:id", handleGetCampaigns)
e.GET("/api/campaigns/:id/preview", handlePreviewCampaign)
e.POST("/api/campaigns/:id/preview", handlePreviewCampaign)
e.POST("/api/campaigns/:id/test", handleTestCampaign)
e.POST("/api/campaigns", handleCreateCampaign)
e.PUT("/api/campaigns/:id", handleUpdateCampaign)
e.PUT("/api/campaigns/:id/status", handleUpdateCampaignStatus)
e.DELETE("/api/campaigns/:id", handleDeleteCampaign)
e.GET("/api/media", handleGetMedia)
e.POST("/api/media", handleUploadMedia)
e.DELETE("/api/media/:id", handleDeleteMedia)
e.GET("/api/templates", handleGetTemplates)
e.GET("/api/templates/:id", handleGetTemplates)
e.GET("/api/templates/:id/preview", handlePreviewTemplate)
e.POST("/api/templates/preview", handlePreviewTemplate)
e.POST("/api/templates", handleCreateTemplate)
e.PUT("/api/templates/:id", handleUpdateTemplate)
e.PUT("/api/templates/:id/default", handleTemplateSetDefault)
e.DELETE("/api/templates/:id", handleDeleteTemplate)
// Subscriber facing views.
e.GET("/unsubscribe/:campUUID/:subUUID", handleUnsubscribePage)
e.POST("/unsubscribe/:campUUID/:subUUID", handleUnsubscribePage)
e.GET("/link/:linkUUID/:campUUID/:subUUID", handleLinkRedirect)
e.GET("/campaign/:campUUID/:subUUID/px.png", handleRegisterCampaignView)
// Static views.
e.GET("/lists", handleIndexPage)
e.GET("/subscribers", handleIndexPage)
e.GET("/subscribers/lists/:listID", handleIndexPage)
e.GET("/subscribers/import", handleIndexPage)
e.GET("/campaigns", handleIndexPage)
e.GET("/campaigns/new", handleIndexPage)
e.GET("/campaigns/media", handleIndexPage)
e.GET("/campaigns/templates", handleIndexPage)
e.GET("/campaigns/:campignID", handleIndexPage)
}
// handleIndex is the root handler that renders the login page if there's no
// authenticated session, or redirects to the dashboard, if there's one.
func handleIndexPage(c echo.Context) error {
app := c.Get("app").(*App)
b, err := app.FS.Read("/frontend/index.html")
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
}
c.Response().Header().Set("Content-Type", "text/html")
return c.String(http.StatusOK, string(b))
}
// makeAttribsBlob takes a list of keys and values and creates
// a JSON map out of them.
func makeAttribsBlob(keys []string, vals []string) ([]byte, bool) {
attribs := make(map[string]interface{})
for i, key := range keys {
var (
s = vals[i]
val interface{}
)
// Try to detect common JSON types.
if govalidator.IsFloat(s) {
val, _ = strconv.ParseFloat(s, 64)
} else if govalidator.IsInt(s) {
val, _ = strconv.ParseInt(s, 10, 64)
} else {
ls := strings.ToLower(s)
if ls == "true" || ls == "false" {
val, _ = strconv.ParseBool(ls)
} else {
// It's a string.
val = s
}
}
attribs[key] = val
}
if len(attribs) > 0 {
j, _ := json.Marshal(attribs)
return j, true
}
return nil, false
}
// getPagination takes form values and extracts pagination values from it.
func getPagination(q url.Values) pagination {
var (
page, _ = strconv.Atoi(q.Get("page"))
perPage = defaultPerPage
)
pp := q.Get("per_page")
if pp == "all" {
// No limit.
perPage = 0
} else {
ppi, _ := strconv.Atoi(pp)
if ppi < 1 || ppi > maxPerPage {
perPage = defaultPerPage
}
}
if page < 1 {
page = 0
} else {
page--
}
return pagination{
Page: page + 1,
PerPage: perPage,
Offset: page * perPage,
Limit: perPage,
}
}