Refactor header code

src/api/list.nim

@@ -7,15 +7,6 @@ import utils, consts, timeline, search
 proc getListTimeline*(username, list, agent, after: string): Future[Timeline] {.async.} =
   let url = base / (listUrl % [username, list])
 
-  let headers = newHttpHeaders({
-    "Accept": jsonAccept,
-    "Referer": $url,
-    "User-Agent": agent,
-    "X-Twitter-Active-User": "yes",
-    "X-Requested-With": "XMLHttpRequest",
-    "Accept-Language": lang
-  })
-
   var params = toSeq({
     "include_available_features": "1",
     "include_entities": "1",
@@ -25,7 +16,7 @@ proc getListTimeline*(username, list, agent, after: string): Future[Timeline] {.
   if after.len > 0:
     params.add {"max_position": after}
 
-  let json = await fetchJson(url ? params, headers)
+  let json = await fetchJson(url ? params, genHeaders(agent, url))
   result = await finishTimeline(json, Query(), after, agent)
   if result.content.len == 0:
     return
@@ -36,16 +27,10 @@ proc getListTimeline*(username, list, agent, after: string): Future[Timeline] {.
     else: get(last.retweet).id
 
 proc getListMembers*(username, list, agent: string): Future[Result[Profile]] {.async.} =
-  let url = base / (listMembersUrl % [username, list])
-
-  let headers = newHttpHeaders({
-    "Accept": htmlAccept,
-    "Referer": $(base / &"{username}/lists/{list}/members"),
-    "User-Agent": agent,
-    "Accept-Language": lang
-  })
-
-  let html = await fetchHtml(url, headers)
+  let
+    url = base / (listMembersUrl % [username, list])
+    referer = base / &"{username}/lists/{list}/members"
+    html = await fetchHtml(url, genHeaders(agent, referer))
 
   result = Result[Profile](
     minId: html.selectAttr(".stream-container", "data-min-position"),
@@ -56,17 +41,10 @@ proc getListMembers*(username, list, agent: string): Future[Result[Profile]] {.a
   )
 
 proc getListMembersSearch*(username, list, agent, after: string): Future[Result[Profile]] {.async.} =
-  let url = base / ((listMembersUrl & "/timeline") % [username, list])
-
-  let headers = newHttpHeaders({
-    "Accept": jsonAccept,
-    "Referer": $(base / &"{username}/lists/{list}/members"),
-    "User-Agent": agent,
-    "X-Twitter-Active-User": "yes",
-    "X-Requested-With": "XMLHttpRequest",
-    "X-Push-With": "XMLHttpRequest",
-    "Accept-Language": lang
-  })
+  let
+    url = base / ((listMembersUrl & "/timeline") % [username, list])
+    referer = base / &"{username}/lists/{list}/members"
+    headers = genHeaders({"x-push-with": "XMLHttpRequest"}, agent, referer, xml=true)
 
   var params = toSeq({
     "include_available_features": "1",

src/api/media.nim

@@ -51,35 +51,23 @@ proc getGuestToken(agent: string; force=false): Future[string] {.async.} =
   tokenUpdated = getTime()
   tokenUses = 0
 
-  let headers = newHttpHeaders({
-    "Accept": jsonAccept,
-    "Referer": $base,
-    "User-Agent": agent,
-    "Authorization": auth
-  })
-
-  newClient()
-
   let
+    headers = genHeaders({"authorization": auth}, agent, base, lang=false)
     url = apiBase / tokenUrl
-    json = parseJson(await client.postContent($url))
+    json = await fetchJson(url, headers)
 
+  if json != nil:
     result = json["guest_token"].to(string)
     guestToken = result
 
 proc getVideoFetch(tweet: Tweet; agent, token: string) {.async.} =
   if tweet.video.isNone(): return
 
-  let headers = newHttpHeaders({
-    "Accept": jsonAccept,
-    "Referer": $(base / getLink(tweet)),
-    "User-Agent": agent,
-    "Authorization": auth,
-    "x-guest-token": token
-  })
-
-  let url = apiBase / (videoUrl % tweet.id)
-  let json = await fetchJson(url, headers)
+  let
+    headers = genHeaders({"authorization": auth, "x-guest-token": token},
+                         agent, base / getLink(tweet), lang=false)
+    url = apiBase / (videoUrl % tweet.id)
+    json = await fetchJson(url, headers)
 
   if json == nil:
     if getTime() - tokenUpdated > initDuration(seconds=1):
@@ -114,52 +102,31 @@ proc getVideo*(tweet: Tweet; agent, token: string; force=false) {.async.} =
 proc getPoll*(tweet: Tweet; agent: string) {.async.} =
   if tweet.poll.isNone(): return
 
-  let headers = newHttpHeaders({
-    "Accept": htmlAccept,
-    "Referer": $(base / getLink(tweet)),
-    "User-Agent": agent,
-    "Authority": "twitter.com",
-    "Accept-Language": lang,
-  })
+  let
+    headers = genHeaders(agent, base / getLink(tweet), auth=true)
+    url = base / (pollUrl % tweet.id)
+    html = await fetchHtml(url, headers)
 
-  let url = base / (pollUrl % tweet.id)
-  let html = await fetchHtml(url, headers)
   if html == nil: return
-
   tweet.poll = some parsePoll(html)
 
 proc getCard*(tweet: Tweet; agent: string) {.async.} =
   if tweet.card.isNone(): return
 
-  let headers = newHttpHeaders({
-    "Accept": htmlAccept,
-    "Referer": $(base / getLink(tweet)),
-    "User-Agent": agent,
-    "Authority": "twitter.com",
-    "Accept-Language": lang,
-  })
+  let
+    headers = genHeaders(agent, base / getLink(tweet), auth=true)
+    query = get(tweet.card).query.replace("sensitive=true", "sensitive=false")
+    html = await fetchHtml(base / query, headers)
 
-  let query = get(tweet.card).query.replace("sensitive=true", "sensitive=false")
-  let html = await fetchHtml(base / query, headers)
   if html == nil: return
-
   parseCard(get(tweet.card), html)
 
 proc getPhotoRail*(username, agent: string): Future[seq[GalleryPhoto]] {.async.} =
-  let headers = newHttpHeaders({
-    "Accept": jsonAccept,
-    "Referer": $(base / username),
-    "User-Agent": agent,
-    "X-Requested-With": "XMLHttpRequest"
-  })
-
-  let params = {
-    "for_photo_rail": "true",
-    "oldest_unread_id": "0"
-  }
-
-  let url = base / (timelineMediaUrl % username) ? params
-  let html = await fetchHtml(url, headers, jsonKey="items_html")
+  let
+    headers = genHeaders({"x-requested-with": "XMLHttpRequest"}, agent, base / username)
+    params = {"for_photo_rail": "true", "oldest_unread_id": "0"}
+    url = base / (timelineMediaUrl % username) ? params
+    html = await fetchHtml(url, headers, jsonKey="items_html")
 
   result = parsePhotoRail(html)
 

src/api/profile.nim

@@ -12,21 +12,15 @@ proc getProfileFallback(username: string; headers: HttpHeaders): Future[Profile]
   result = parseIntentProfile(html)
 
 proc getProfile*(username, agent: string): Future[Profile] {.async.} =
-  let headers = newHttpHeaders({
-    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9",
-    "Referer": $(base / username),
-    "User-Agent": agent,
-    "X-Twitter-Active-User": "yes",
-    "X-Requested-With": "XMLHttpRequest",
-    "Accept-Language": lang
-  })
-
   let
+    headers = genHeaders(agent, base / username, xml=true)
+
     params = {
       "screen_name": username,
       "wants_hovercard": "true",
       "_": $(epochTime().int)
     }
+
     url = base / profilePopupUrl ? params
     html = await fetchHtml(url, headers, jsonKey="html")
 
@@ -37,14 +31,11 @@ proc getProfile*(username, agent: string): Future[Profile] {.async.} =
 
   result = parsePopupProfile(html)
 
-proc getProfileFull*(username: string): Future[Profile] {.async.} =
-  let headers = newHttpHeaders({
-    "authority": "twitter.com",
-    "accept": htmlAccept,
-    "referer": "https://twitter.com/" & username,
-    "accept-language": lang
-  })
+proc getProfileFull*(username, agent: string): Future[Profile] {.async.} =
+  let
+    url = base / username
+    headers = genHeaders(agent, url, auth=true)
+    html = await fetchHtml(url, headers)
 
-  let html = await fetchHtml(base / username, headers)
   if html == nil: return
   result = parseTimelineProfile(html)

src/api/search.nim

@@ -22,14 +22,8 @@ proc getSearch*[T](query: Query; after, agent: string): Future[Result[T]] {.asyn
     param = genQueryParam(query)
     encoded = encodeUrl(param, usePlus=false)
 
-    headers = newHttpHeaders({
-      "Accept": jsonAccept,
-      "Referer": $(base / ("search?f=$1&q=$2&src=typd" % [kind, encoded])),
-      "User-Agent": agent,
-      "X-Requested-With": "XMLHttpRequest",
-      "Authority": "twitter.com",
-      "Accept-Language": lang
-    })
+    referer = base / ("search?f=$1&q=$2&src=typd" % [kind, encoded])
+    headers = genHeaders(agent, referer, auth=true, xml=true)
 
     params = {
       "f": kind,

src/api/timeline.nim

@@ -22,14 +22,7 @@ proc finishTimeline*(json: JsonNode; query: Query; after, agent: string): Future
   result.content = thread.content
 
 proc getTimeline*(username, after, agent: string): Future[Timeline] {.async.} =
-  let headers = newHttpHeaders({
-    "Accept": jsonAccept,
-    "Referer": $(base / username),
-    "User-Agent": agent,
-    "X-Twitter-Active-User": "yes",
-    "X-Requested-With": "XMLHttpRequest",
-    "Accept-Language": lang
-  })
+  let headers = genHeaders(agent, base / username, xml=true)
 
   var params = toSeq({
     "include_available_features": "1",
@@ -45,18 +38,12 @@ proc getTimeline*(username, after, agent: string): Future[Timeline] {.async.} =
   result = await finishTimeline(json, Query(), after, agent)
 
 proc getProfileAndTimeline*(username, agent, after: string): Future[(Profile, Timeline)] {.async.} =
-  let headers = newHttpHeaders({
-    "authority": "twitter.com",
-    "accept": htmlAccept,
-    "referer": "https://twitter.com/" & username,
-    "accept-language": lang
-  })
-
   var url = base / username
   if after.len > 0:
     url = url ? {"max_position": after}
 
   let
+    headers = genHeaders(agent, base / username, auth=true)
     html = await fetchHtml(url, headers)
     timeline = parseTimeline(html.select("#timeline > .stream-container"), after)
     profile = parseTimelineProfile(html)

src/api/tweet.nim

@@ -4,18 +4,12 @@ import ".."/[types, parser]
 import utils, consts, media
 
 proc getTweet*(username, id, after, agent: string): Future[Conversation] {.async.} =
-  let headers = newHttpHeaders({
-    "Accept": jsonAccept,
-    "Referer": $base,
-    "User-Agent": agent,
-    "X-Twitter-Active-User": "yes",
-    "X-Requested-With": "XMLHttpRequest",
-    "Accept-Language": lang,
-    "Pragma": "no-cache",
-    "X-Previous-Page-Name": "profile"
-  })
-
   let
+    headers = genHeaders({
+      "pragma": "no-cache",
+      "x-previous-page-name": "profile"
+    }, agent, base, xml=true)
+
     url = base / username / tweetUrl / id ? {"max_position": after}
     html = await fetchHtml(url, headers)
 

src/api/utils.nim

@@ -1,12 +1,35 @@
 import httpclient, asyncdispatch, htmlparser
 import strutils, json, xmltree, uri
 
+import consts
+
+proc genHeaders*(headers: openArray[tuple[key: string, val: string]];
+                 agent: string; referer: Uri; lang=true;
+                 auth=false; xml=false): HttpHeaders =
+  result = newHttpHeaders({
+    "referer": $referer,
+    "user-agent": agent,
+    "x-twitter-active-user": "yes",
+  })
+
+  if auth: result["authority"] = "twitter.com"
+  if lang: result["accept-language"] = consts.lang
+  if xml:  result["x-requested-with"] = "XMLHttpRequest"
+
+  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)
+
 template newClient*() {.dirty.} =
   var client = newAsyncHttpClient()
   defer: client.close()
   client.headers = headers
 
 proc fetchHtml*(url: Uri; headers: HttpHeaders; jsonKey = ""): Future[XmlNode] {.async.} =
+  headers["accept"] = htmlAccept
   newClient()
 
   var resp = ""
@@ -16,12 +39,11 @@ proc fetchHtml*(url: Uri; headers: HttpHeaders; jsonKey = ""): Future[XmlNode] {
     return nil
 
   if jsonKey.len > 0:
-    let json = parseJson(resp)[jsonKey].str
-    return parseHtml(json)
-  else:
+    resp = parseJson(resp)[jsonKey].str
   return parseHtml(resp)
 
 proc fetchJson*(url: Uri; headers: HttpHeaders): Future[JsonNode] {.async.} =
+  headers["accept"] = jsonAccept
   newClient()
 
   var resp = ""

src/cache.nim

@@ -39,7 +39,7 @@ proc getCachedProfile*(username, agent: string; force=false): Future[Profile] {.
       result.getOne("lower(username) = ?", toLower(username))
       doAssert not result.isOutdated
     except AssertionError, KeyError:
-      result = await getProfileFull(username)
+      result = await getProfileFull(username, agent)
       cache(result)
 
 proc setProfileCacheTime*(minutes: int) =

tests/test_card.py

@@ -9,8 +9,8 @@ card = [
      'github.com', False],
 
     ['lorenlugosch/status/1115440394148487168',
-     'lorenlugosch/pretrain_speech_model',
-     'Speech Model Pre-training for End-to-End Spoken Language Understanding - lorenlugosch/pretrain_speech_model',
+     'lorenlugosch/end-to-end-SLU',
+     'PyTorch code for end-to-end spoken language understanding (SLU) with ASR-based transfer learning - lorenlugosch/end-to-end-SLU',
      'github.com', False],
 
     ['PyTorch/status/1123379369672450051',
@@ -85,12 +85,7 @@ playable = [
     ['nim_lang/status/1121090879823986688',
      'Nim - First natively compiled language w/ hot code-reloading at...',
      '#nim #c++ #ACCUConf Nim is a statically typed systems and applications programming language which offers perhaps some of the most powerful metaprogramming ca...',
-     'youtube.com'],
-
-    ['lele/status/819930645145288704',
-     'Eurocrash presents Open Decks - emerging dj #4: E-Musik',
-     "OPEN DECKS is Eurocrash's new project about discovering new and emerging dj talents. Every selected dj will have the chance to perform the first dj-set in front of an actual audience. The best dj...",
-     'mixcloud.com']
+     'youtube.com']
 ]
 
 promo = [