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package svc // import "github.com/getwtxt/getwtxt/svc"
import (
"crypto/sha256"
"fmt"
"net/http"
"strconv"
"time"
"github.com/getwtxt/registry"
"github.com/gorilla/mux"
)
func getEtag(modtime time.Time) string {
shabytes, err := modtime.MarshalText()
errLog("", err)
return fmt.Sprintf("%x", sha256.Sum256(shabytes))
}
// handles "/"
func indexHandler(w http.ResponseWriter, r *http.Request) {
pingAssets()
// Take the hex-encoded sha256 sum of the index template's mod time
// to send as an ETag. If an error occurred when grabbing the file info,
// the ETag will be empty.
staticCache.mu.RLock()
etag := getEtag(staticCache.indexMod)
w.Header().Set("ETag", "\""+etag+"\"")
w.Header().Set("Content-Type", htmlutf8)
_, err := w.Write(staticCache.index)
staticCache.mu.RUnlock()
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
return
}
log200(r)
}
// Serving the stylesheet virtually because
// files aren't served directly in getwtxt.
func cssHandler(w http.ResponseWriter, r *http.Request) {
pingAssets()
staticCache.mu.RLock()
etag := getEtag(staticCache.cssMod)
w.Header().Set("ETag", "\""+etag+"\"")
w.Header().Set("Content-Type", cssutf8)
_, err := w.Write(staticCache.css)
staticCache.mu.RUnlock()
if err != nil {
errHTTP(w, r, err, http.StatusInternalServerError)
return
}
log200(r)
}
// handles "/api"
func apiBaseHandler(w http.ResponseWriter, r *http.Request) {
indexHandler(w, r)
}
// handles "/api/plain"
// maybe add json/xml support later
func apiFormatHandler(w http.ResponseWriter, r *http.Request) {
indexHandler(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 := fmt.Sprintf("%x", sha256.Sum256(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)
return
}
log200(r)
return
}
var err error
page := 1
pageVal := r.FormValue("page")
switch pageVal {
case "":
break
default:
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)
default:
errHTTP(w, r, fmt.Errorf("endpoint not found"), http.StatusNotFound)
return
}
errLog("", err)
data := parseQueryOut(out)
etag := fmt.Sprintf("%x", sha256.Sum256(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 := fmt.Sprintf("%x", sha256.Sum256(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 := fmt.Sprintf("%x", sha256.Sum256(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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