Add workaround for Twitter's layout A/B testing

Fixes #110

src/api/cookie.nim

@@ -0,0 +1,16 @@
+import httpclient, strutils
+
+proc getGuestId*(): string =
+  let client = newHttpClient()
+  for i in 0 .. 10:
+    try:
+      let req = client.get("https://twitter.com")
+      if "react-root" in req.body: continue
+      for k, v in req.headers:
+        if "guest_id" in v:
+          return v[v.find("=") + 1 .. v.find(";")]
+    except:
+      discard
+    finally:
+      try: client.close()
+      except: discard

src/api/list.nim

@@ -54,7 +54,7 @@ proc getListMembers*(username, list, after, agent: string): Future[Result[Profil
 
   let
     url = base / (listMembersUrl % [username, list])
-    html = await fetchHtml(url, genHeaders(agent, url))
+    html = await fetchHtml(url, genHeaders(agent, url, guestId=true))
 
   result = Result[Profile](
     minId: html.selectAttr(".stream-container", "data-min-position"),

src/api/profile.nim

@@ -34,7 +34,7 @@ proc getProfile*(username, agent: string): Future[Profile] {.async.} =
 proc getProfileFull*(username, agent: string): Future[Profile] {.async.} =
   let
     url = base / username
-    headers = genHeaders(agent, url, auth=true)
+    headers = genHeaders(agent, url, auth=true, guestId=true)
     html = await fetchHtml(url, headers)
 
   if html == nil: return

src/api/search.nim

@@ -14,7 +14,8 @@ proc getResult*[T](json: JsonNode; query: Query; after: string): Result[T] =
     beginning: after.len == 0
   )
 
-proc getSearch*[T](query: Query; after, agent: string; media=true): Future[Result[T]] {.async.} =
+proc getSearch*[T](query: Query; after, agent: string;
+                   media=true): Future[Result[T]] {.async.} =
   let
     kind = if query.kind == users: "users" else: "tweets"
 
@@ -22,7 +23,7 @@ proc getSearch*[T](query: Query; after, agent: string; media=true): Future[Resul
     encoded = encodeUrl(param, usePlus=false)
 
     referer = base / ("search?f=$1&q=$2&src=typd" % [kind, encoded])
-    headers = genHeaders(agent, referer, auth=true, xml=true)
+    headers = genHeaders(agent, referer, auth=true, xml=true, guestId=true)
 
     params = {
       "f": kind,

src/api/timeline.nim

@@ -30,12 +30,12 @@ proc getProfileAndTimeline*(username, after, agent: string;
     url = url ? {"max_position": after}
 
   let
-    headers = genHeaders(agent, base / username, auth=true)
+    headers = genHeaders(agent, base / username, auth=true, guestId=true)
     html = await fetchHtml(url, headers)
     timeline = parseTimeline(html.select("#timeline > .stream-container"), after)
     profile = parseTimelineProfile(html)
 
-  if media: await getMedia(timeline, agent)
+  if media and profile.username.len > 0: await getMedia(timeline, agent)
   result = (profile, timeline)
 
 proc getTimeline*(username, after, agent: string;

src/api/tweet.nim

@@ -8,7 +8,7 @@ proc getTweet*(username, id, after, agent: string): Future[Conversation] {.async
     headers = genHeaders({
       "pragma": "no-cache",
       "x-previous-page-name": "profile"
-    }, agent, base, xml=true)
+    }, agent, base, xml=true, guestId=true)
 
     url = base / username / tweetUrl / id ? {"max_position": after}
     html = await fetchHtml(url, headers)

src/api/utils.nim

@@ -2,11 +2,13 @@ import httpclient, asyncdispatch, htmlparser, options
 import strutils, json, xmltree, uri
 
 import ../types
-import consts
+import consts, cookie
+
+var guestIdCookie = "guest_id=" & getGuestId()
 
 proc genHeaders*(headers: openArray[tuple[key: string, val: string]];
                  agent: string; referer: Uri; lang=true;
-                 auth=false; xml=false): HttpHeaders =
+                 auth=false; xml=false; guestId=false): HttpHeaders =
   result = newHttpHeaders({
     "referer": $referer,
     "user-agent": agent,
@@ -16,13 +18,14 @@ proc genHeaders*(headers: openArray[tuple[key: string, val: string]];
   if auth: result["authority"] = "twitter.com"
   if lang: result["accept-language"] = consts.lang
   if xml:  result["x-requested-with"] = "XMLHttpRequest"
+  if guestId: result["cookie"] = guestIdCookie
 
   for (key, val) in headers:
     result[key] = val
 
 proc genHeaders*(agent: string; referer: Uri; lang=true;
-                 auth=false; xml=false): HttpHeaders =
-  genHeaders([], agent, referer, lang, auth, xml)
+                 auth=false; xml=false; guestId=false): HttpHeaders =
+  genHeaders([], agent, referer, lang, auth, xml, guestId)
 
 template newClient*() {.dirty.} =
   var client = newAsyncHttpClient()

src/cache.nim

@@ -41,7 +41,8 @@ proc hasCachedProfile*(username: string): Option[Profile] =
     except AssertionError, KeyError:
       result = none Profile
 
-proc getCachedProfile*(username, agent: string; force=false): Future[Profile] {.async.} =
+proc getCachedProfile*(username, agent: string;
+                       force=false): Future[Profile] {.async.} =
   withDb:
     try:
       result.getOne("lower(username) = ?", toLower(username))

src/routes/rss.nim

@@ -20,7 +20,8 @@ proc showRss*(req: Request; hostname: string; query: Query): Future[(string, str
     (profile, timeline) =
       await fetchSingleTimeline(names[0], after, getAgent(), query, media=false)
   else:
-    timeline = await fetchMultiTimeline(names, after, getAgent(), query, media=false)
+    let multiQuery = query.getMultiQuery(names)
+    timeline = await getSearch[Tweet](multiQuery, after, getAgent(), media=false)
     # this is kinda dumb
     profile = Profile(
       username: name,

src/routes/timeline.nim

@@ -45,13 +45,11 @@ proc fetchSingleTimeline*(name, after, agent: string; query: Query;
   if profile.username.len == 0: return
   return (profile, timeline)
 
-proc fetchMultiTimeline*(names: seq[string]; after, agent: string; query: Query;
-                         media=true): Future[Timeline] {.async.} =
-  var q = query
-  q.fromUser = names
+proc getMultiQuery*(q: Query; names: seq[string]): Query =
+  result = q
+  result.fromUser = names
   if q.kind == posts and "replies" notin q.excludes:
-    q.excludes.add "replies"
-  return await getSearch[Tweet](q, after, agent, media)
+    result.excludes.add "replies"
 
 proc get*(req: Request; key: string): string =
   params(req).getOrDefault(key)
@@ -62,8 +60,10 @@ proc showTimeline*(request: Request; query: Query; cfg: Config; prefs: Prefs;
   let names = getNames(request.get("name"))
 
   if names.len != 1:
-    let timeline = await fetchMultiTimeline(names, after, agent, query)
-    let html = renderTweetSearch(timeline, prefs, getPath())
+    let
+      multiQuery = query.getMultiQuery(names)
+      timeline = await getSearch[Tweet](multiQuery, after, agent)
+      html = renderTweetSearch(timeline, prefs, getPath())
     return renderMain(html, request, cfg, "Multi", rss=rss)
 
   let