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/*
Copyright (c) 2019 Ben Morrison (gbmor)
This file is part of Getwtxt.
Getwtxt is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Getwtxt is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Getwtxt. If not, see <https://www.gnu.org/licenses/>.
*/
package svc // import "github.com/getwtxt/getwtxt/svc"
import (
"fmt"
"hash/fnv"
"net/http"
"strconv"
"strings"
"time"
"github.com/getwtxt/registry"
"github.com/gorilla/mux"
)
func getEtagFromTime(modtime time.Time) string {
shabytes, err := modtime.MarshalText()
errLog("", err)
return fmt.Sprintf("%x", fnv.New32().Sum(shabytes))
}
func getEtag(data []byte) string {
return fmt.Sprintf("%x", fnv.New32().Sum(data))
}
func servStatic(w http.ResponseWriter, isCSS bool) error {
pingAssets()
staticCache.mu.RLock()
defer staticCache.mu.RUnlock()
var etag string
var body []byte
var contentType string
if isCSS {
etag = getEtagFromTime(staticCache.cssMod)
contentType = cssutf8
body = staticCache.css
} else {
etag = getEtagFromTime(staticCache.indexMod)
contentType = htmlutf8
body = staticCache.index
}
w.Header().Set("ETag", "\""+etag+"\"")
w.Header().Set("Content-Type", contentType)
_, err := w.Write(body)
return err
}
// handles "/" and "/css"
func staticHandler(w http.ResponseWriter, r *http.Request) {
isCSS := strings.Contains(r.URL.Path, "css")
if err := servStatic(w, isCSS); err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
return
}
log200(r)
}
// handles "/api"
func apiBaseHandler(w http.ResponseWriter, r *http.Request) {
staticHandler(w, r)
}
// handles "/api/plain"
// maybe add json/xml support later
func apiFormatHandler(w http.ResponseWriter, r *http.Request) {
staticHandler(w, r)
}
func apiAllTweetsHandler(w http.ResponseWriter, r *http.Request) {
out, err := twtxtCache.QueryAllStatuses()
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
}
data := parseQueryOut(out)
etag := getEtag(data)
w.Header().Set("ETag", etag)
w.Header().Set("Content-Type", txtutf8)
_, err = w.Write(data)
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
return
}
log200(r)
}
// handles "/api/plain/(users|mentions|tweets)"
func apiEndpointHandler(w http.ResponseWriter, r *http.Request) {
errLog("Error when parsing query values: ", r.ParseForm())
if r.FormValue("q") != "" || r.FormValue("url") != "" {
err := apiEndpointQuery(w, r)
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
} else {
log200(r)
}
return
}
var err error
page := 1
pageVal := r.FormValue("page")
if pageVal != "" {
page, err = strconv.Atoi(pageVal)
if err != nil || page < 1 {
page = 1
}
}
// if there's no query, return everything in
// registry for a given endpoint
var out []string
switch r.URL.Path {
case "/api/plain/users":
out, err = twtxtCache.QueryUser("")
out = registry.ReduceToPage(page, out)
case "/api/plain/mentions":
out, err = twtxtCache.QueryInStatus("@<")
out = registry.ReduceToPage(page, out)
case "/api/plain/tweets":
out, err = twtxtCache.QueryAllStatuses()
out = registry.ReduceToPage(page, out)
case "/api/plain/version":
etag := getEtag([]byte(Vers))
w.Header().Set("ETag", "\""+etag+"\"")
w.Header().Set("Content-Type", txtutf8)
_, err := w.Write([]byte(strings.TrimSpace("getwtxt " + Vers)))
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
} else {
log200(r)
}
return
default:
errHTTP(w, r, fmt.Errorf("endpoint not found"), http.StatusNotFound)
return
}
errLog("", err)
data := parseQueryOut(out)
etag := getEtag(data)
w.Header().Set("ETag", etag)
w.Header().Set("Content-Type", txtutf8)
_, err = w.Write(data)
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
} else {
log200(r)
}
}
// handles POST for "/api/plain/users"
func apiEndpointPOSTHandler(w http.ResponseWriter, r *http.Request) {
apiPostUser(w, r)
}
// handles "/api/plain/tags"
func apiTagsBaseHandler(w http.ResponseWriter, r *http.Request) {
out, err := twtxtCache.QueryInStatus("#")
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
return
}
out = registry.ReduceToPage(1, out)
data := parseQueryOut(out)
etag := getEtag(data)
w.Header().Set("ETag", etag)
w.Header().Set("Content-Type", txtutf8)
_, err = w.Write(data)
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
return
}
log200(r)
}
// handles "/api/plain/tags/[a-zA-Z0-9]+"
func apiTagsHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
tags := vars["tags"]
out := compositeStatusQuery("#"+tags, r)
out = registry.ReduceToPage(1, out)
data := parseQueryOut(out)
etag := getEtag(data)
w.Header().Set("ETag", etag)
w.Header().Set("Content-Type", txtutf8)
_, err := w.Write(data)
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
return
}
log200(r)
}
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