Enable 'wrapcheck' linter

.golangci.yaml

@@ -23,7 +23,7 @@ linters:
     - unused
     - varcheck
     - whitespace
-    # - wrapcheck
+    - wrapcheck
     - lll
     - godox
     - errorlint
@@ -533,17 +533,11 @@ linters-settings:
 #     multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
 #     multi-func: false # Enforces newlines (or comments) after every multi-line function signature
 
-#   wrapcheck:
+  wrapcheck:
-#     # An array of strings that specify substrings of signatures to ignore.
+    # An array of strings that specify substrings of signatures to ignore.
-#     # If this set, it will override the default set of ignored signatures.
+    # If this set, it will override the default set of ignored signatures.
-#     # See https://github.com/tomarrell/wrapcheck#configuration for more information.
+    # See https://github.com/tomarrell/wrapcheck#configuration for more information.
-#     ignoreSigs:
+    ignoreSigs:
-#       - .Errorf(
-#       - errors.New(
-#       - errors.Unwrap(
-#       - .Wrap(
-#       - .Wrapf(
-#       - .WithMessage(
 
 #   # The custom section can be used to define linter plugins to be loaded at runtime.
 #   # See README doc for more info.

persistence/media_download.go

@@ -28,7 +28,7 @@ func (d DefaultDownloader) Curl(url string, outpath string) error {
 	println(url)
 	resp, err := http.Get(url)
 	if err != nil {
-		return err
+		return fmt.Errorf("Error executing HTTP GET(%q):\n  %w", url, err)
 	}
 	if resp.StatusCode != 200 {
 		return fmt.Errorf("Error %s: %s", url, resp.Status)
@@ -53,7 +53,7 @@ func (p Profile) download_tweet_image(img *scraper.Image, downloader MediaDownlo
 	outfile := path.Join(p.ProfileDir, "images", img.LocalFilename)
 	err := downloader.Curl(img.RemoteURL, outfile)
 	if err != nil {
-		return err
+		return fmt.Errorf("Error downloading tweet image (TweetID %d):\n  %w", img.TweetID, err)
 	}
 	img.IsDownloaded = true
 	return p.SaveImage(*img)
@@ -67,14 +67,14 @@ func (p Profile) download_tweet_video(v *scraper.Video, downloader MediaDownload
 	outfile := path.Join(p.ProfileDir, "videos", v.LocalFilename)
 	err := downloader.Curl(v.RemoteURL, outfile)
 	if err != nil {
-		return err
+		return fmt.Errorf("Error downloading video (TweetID %d):\n  %w", v.TweetID, err)
 	}
 
 	// Download the thumbnail
 	outfile = path.Join(p.ProfileDir, "video_thumbnails", v.ThumbnailLocalPath)
 	err = downloader.Curl(v.ThumbnailRemoteUrl, outfile)
 	if err != nil {
-		return err
+		return fmt.Errorf("Error downloading video thumbnail (TweetID %d):\n  %w", v.TweetID, err)
 	}
 
 	v.IsDownloaded = true
@@ -89,7 +89,7 @@ func (p Profile) download_link_thumbnail(url *scraper.Url, downloader MediaDownl
 		outfile := path.Join(p.ProfileDir, "link_preview_images", url.ThumbnailLocalPath)
 		err := downloader.Curl(url.ThumbnailRemoteUrl, outfile)
 		if err != nil {
-			return err
+			return fmt.Errorf("Error downloading link thumbnail (TweetID %d):\n  %w", url.TweetID, err)
 		}
 	}
 	url.IsContentDownloaded = true
@@ -166,7 +166,7 @@ func (p Profile) DownloadUserContentWithInjector(u *scraper.User, downloader Med
 
 	err := downloader.Curl(target_url, outfile)
 	if err != nil {
-		return err
+		return fmt.Errorf("Error downloading profile image for user %q:\n  %w", u.Handle, err)
 	}
 
 	// Skip it if there's no banner image
@@ -179,7 +179,7 @@ func (p Profile) DownloadUserContentWithInjector(u *scraper.User, downloader Med
 			err = downloader.Curl(u.BannerImageUrl+"/600x200", outfile)
 		}
 		if err != nil {
-			return err
+			return fmt.Errorf("Error downloading banner image for user %q:\n  %w", u.Handle, err)
 		}
 	}
 

persistence/media_queries.go

@@ -1,6 +1,8 @@
 package persistence
 
 import (
+	"fmt"
+
 	"offline_twitter/scraper"
 )
 
@@ -20,7 +22,10 @@ func (p Profile) SaveImage(img scraper.Image) error {
 		img.ID, img.TweetID, img.Width, img.Height, img.RemoteURL, img.LocalFilename, img.IsDownloaded,
 		img.IsDownloaded,
 	)
-	return err
+	if err != nil {
+		return fmt.Errorf("Error saving image (tweet ID %d):\n  %w", img.TweetID, err)
+	}
+	return nil
 }
 
 /**
@@ -43,7 +48,10 @@ func (p Profile) SaveVideo(vid scraper.Video) error {
 
 		vid.IsDownloaded, vid.ViewCount,
 	)
-	return err
+	if err != nil {
+		return fmt.Errorf("Error saving video (tweet ID %d):\n  %w", vid.TweetID, err)
+	}
+	return nil
 }
 
 /**
@@ -62,7 +70,10 @@ func (p Profile) SaveUrl(url scraper.Url) error {
 
 		url.IsContentDownloaded,
 	)
-	return err
+	if err != nil {
+		return fmt.Errorf("Error saving Url (tweet ID %d):\n  %w", url.TweetID, err)
+	}
+	return nil
 }
 
 /**
@@ -85,7 +96,10 @@ func (p Profile) SavePoll(poll scraper.Poll) error {
 
 		poll.Choice1_Votes, poll.Choice2_Votes, poll.Choice3_Votes, poll.Choice4_Votes, poll.LastUpdatedAt,
 	)
-	return err
+	if err != nil {
+		return fmt.Errorf("Error saving Poll (tweet ID %d):\n  %w", poll.TweetID, err)
+	}
+	return nil
 }
 
 /**

persistence/profile.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path"
+
 	sql "github.com/jmoiron/sqlx"
 	"github.com/jmoiron/sqlx/reflectx"
 	_ "github.com/mattn/go-sqlite3"
@@ -51,7 +52,7 @@ func NewProfile(target_dir string) (Profile, error) {
 	fmt.Printf("Creating new profile: %s\n", target_dir)
 	err := os.Mkdir(target_dir, os.FileMode(0755))
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error creating directory %q:\n  %w", target_dir, err)
 	}
 
 	// Create `twitter.db`
@@ -66,46 +67,46 @@ func NewProfile(target_dir string) (Profile, error) {
 	settings := Settings{}
 	data, err := yaml.Marshal(&settings)
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error YAML-marshalling [empty!] settings file:\n  %w", err)
 	}
 	err = os.WriteFile(settings_file, data, os.FileMode(0644))
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error creating settings file %q:\n  %w", settings_file, err)
 	}
 
 	// Create `profile_images`
 	fmt.Printf("Creating............. %s/\n", profile_images_dir)
 	err = os.Mkdir(profile_images_dir, os.FileMode(0755))
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error creating %q:\n  %w", profile_images_dir, err)
 	}
 
 	// Create `link_thumbnail_images`
 	fmt.Printf("Creating............. %s/\n", link_thumbnails_dir)
 	err = os.Mkdir(link_thumbnails_dir, os.FileMode(0755))
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error creating %q:\n  %w", link_thumbnails_dir, err)
 	}
 
 	// Create `images`
 	fmt.Printf("Creating............. %s/\n", images_dir)
 	err = os.Mkdir(images_dir, os.FileMode(0755))
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error creating %q:\n  %w", images_dir, err)
 	}
 
 	// Create `videos`
 	fmt.Printf("Creating............. %s/\n", videos_dir)
 	err = os.Mkdir(videos_dir, os.FileMode(0755))
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error creating %q:\n  %w", videos_dir, err)
 	}
 
 	// Create `video_thumbnails`
 	fmt.Printf("Creating............. %s/\n", video_thumbnails_dir)
 	err = os.Mkdir(video_thumbnails_dir, os.FileMode(0755))
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error creating %q:\n  %w", video_thumbnails_dir, err)
 	}
 
 	return Profile{target_dir, settings, db}, nil
@@ -135,12 +136,12 @@ func LoadProfile(profile_dir string) (Profile, error) {
 
 	settings_data, err := os.ReadFile(settings_file)
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error reading %q:\n  %w", settings_file, err)
 	}
 	settings := Settings{}
 	err = yaml.Unmarshal(settings_data, &settings)
 	if err != nil {
-		return Profile{}, err
+		return Profile{}, fmt.Errorf("Error YAML-unmarshalling %q:\n  %w", settings_file, err)
 	}
 
 	db := sql.MustOpen("sqlite3", fmt.Sprintf("%s?_foreign_keys=on&_journal_mode=WAL", sqlite_file))

persistence/retweet_queries.go

@@ -1,6 +1,8 @@
 package persistence
 
 import (
+	"fmt"
+
 	"offline_twitter/scraper"
 )
 
@@ -15,7 +17,10 @@ func (p Profile) SaveRetweet(r scraper.Retweet) error {
 		`,
 		r.RetweetID, r.TweetID, r.RetweetedByID, r.RetweetedAt.Unix(),
 	)
-	return err
+	if err != nil {
+		return fmt.Errorf("Error executing SaveRetweet(%d):\n  %w", r.RetweetID, err)
+	}
+	return nil
 }
 
 /**
@@ -28,5 +33,8 @@ func (p Profile) GetRetweetById(id scraper.TweetID) (scraper.Retweet, error) {
 		  from retweets
 		 where retweet_id = ?
 	`, id)
-	return r, err
+	if err != nil {
+		return r, fmt.Errorf("Error executing GetRetweetById(%d):\n  %w", id, err)
+	}
+	return r, nil
 }

persistence/tweet_queries.go

@@ -2,8 +2,9 @@ package persistence
 
 import (
 	"database/sql"
-	"strings"
 	"errors"
+	"fmt"
+	"strings"
 
 	"offline_twitter/scraper"
 )
@@ -37,7 +38,7 @@ func (p Profile) SaveTweet(t scraper.Tweet) error {
 	)
 
 	if err != nil {
-		return err
+		return fmt.Errorf("Error executing SaveTweet(ID %d):\n  %w", t.ID, err)
 	}
 	for _, url := range t.Urls {
 		err := p.SaveUrl(url)
@@ -60,7 +61,7 @@ func (p Profile) SaveTweet(t scraper.Tweet) error {
 	for _, hashtag := range t.Hashtags {
 		_, err := db.Exec("insert into hashtags (tweet_id, text) values (?, ?) on conflict do nothing", t.ID, hashtag)
 		if err != nil {
-			return err
+			return fmt.Errorf("Error inserting hashtag %q on tweet ID %d:\n  %w", hashtag, t.ID, err)
 		}
 	}
 	for _, poll := range t.Polls {
@@ -72,7 +73,7 @@ func (p Profile) SaveTweet(t scraper.Tweet) error {
 
 	err = tx.Commit()
 	if err != nil {
-		return err
+		return fmt.Errorf("Error committing SaveTweet transaction:\n  %w", err)
 	}
 	return nil
 }
@@ -104,7 +105,7 @@ func (p Profile) GetTweetById(id scraper.TweetID) (scraper.Tweet, error) {
     `)
 
 	if err != nil {
-		return scraper.Tweet{}, err
+		return scraper.Tweet{}, fmt.Errorf("Error preparing statement in GetTweetByID(%d):\n  %w", id, err)
 	}
 	defer stmt.Close()
 
@@ -118,7 +119,7 @@ func (p Profile) GetTweetById(id scraper.TweetID) (scraper.Tweet, error) {
 		&t.QuotedTweetID, &mentions, &reply_mentions, &hashtags, &t.TombstoneType, &t.IsStub, &t.IsContentDownloaded,
 		&t.IsConversationScraped, &t.LastScrapedAt)
 	if err != nil {
-		return t, err
+		return t, fmt.Errorf("Error parsing result in GetTweetByID(%d):\n  %w", id, err)
 	}
 
 	t.Mentions = []scraper.UserHandle{}

persistence/user_queries.go

@@ -1,9 +1,10 @@
 package persistence
 
 import (
-	"fmt"
-	"errors"
 	"database/sql"
+	"errors"
+	"fmt"
+
 	"offline_twitter/scraper"
 )
 
@@ -59,7 +60,7 @@ func (p Profile) SaveUser(u *scraper.User) error {
 		u.ProfileImageUrl, u.ProfileImageLocalPath, u.BannerImageUrl, u.BannerImageLocalPath, u.PinnedTweetID, u.IsContentDownloaded,
 	)
 	if err != nil {
-		return err
+		return fmt.Errorf("Error executing SaveUser(%s):\n  %w", u.Handle, err)
 	}
 
 	return nil
@@ -140,7 +141,10 @@ func (p Profile) GetUserByID(id scraper.UserID) (scraper.User, error) {
 	if errors.Is(err, sql.ErrNoRows) {
 		return ret, ErrNotInDatabase{"User", id}
 	}
-	return ret, err
+	if err != nil {
+		panic(err)
+	}
+	return ret, nil
 }
 
 /**

persistence/versions.go

@@ -87,7 +87,7 @@ func (p Profile) GetDatabaseVersion() (int, error) {
 
 	err := row.Scan(&version)
 	if err != nil {
-		return 0, err
+		return 0, fmt.Errorf("Error checking database version:\n  %w", err)
 	}
 	return version, nil
 }

scraper/api_request_utils.go

@@ -20,12 +20,12 @@ func (api API) GetFeedFor(user_id UserID, cursor string) (TweetResponse, error)
 	client := &http.Client{Timeout: 10 * time.Second}
 	req, err := http.NewRequest("GET", fmt.Sprintf("%s%d.json", API_USER_TIMELINE_BASE_PATH, user_id), nil)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error initializing HTTP request for GetFeedFor(%d):\n  %w", user_id, err)
 	}
 
 	err = ApiRequestAddTokens(req)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error adding tokens to HTTP request:\n  %w", err)
 	}
 
 	ApiRequestAddAllParams(req)
@@ -36,7 +36,7 @@ func (api API) GetFeedFor(user_id UserID, cursor string) (TweetResponse, error)
 
 	resp, err := client.Do(req)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error executing HTTP request for GetFeedFor(%d):\n  %w", user_id, err)
 	}
 	defer resp.Body.Close()
 
@@ -54,13 +54,16 @@ func (api API) GetFeedFor(user_id UserID, cursor string) (TweetResponse, error)
 
 	body, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error reading response body for GetUserFeedFor(%d):\n  %w", user_id, err)
 	}
 	log.Debug(string(body))
 
 	var response TweetResponse
 	err = json.Unmarshal(body, &response)
-	return response, err
+	if err != nil {
+		return response, fmt.Errorf("Error parsing API response for GetUserFeedFor(%d):\n  %w", user_id, err)
+	}
+	return response, nil
 }
 
 /**
@@ -104,17 +107,16 @@ func (api API) GetMoreTweetsFromFeed(user_id UserID, response *TweetResponse, mi
 	return nil
 }
 
-
 func (api API) GetTweet(id TweetID, cursor string) (TweetResponse, error) {
 	client := &http.Client{Timeout: 10 * time.Second}
 	req, err := http.NewRequest("GET", fmt.Sprintf("%s%d.json", API_CONVERSATION_BASE_PATH, id), nil)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error initializing HTTP request:\n  %w", err)
 	}
 
 	err = ApiRequestAddTokens(req)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error adding tokens to HTTP request:\n  %w", err)
 	}
 
 	ApiRequestAddAllParams(req)
@@ -124,7 +126,7 @@ func (api API) GetTweet(id TweetID, cursor string) (TweetResponse, error) {
 
 	resp, err := client.Do(req)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error executing HTTP request:\n  %w", err)
 	}
 	defer resp.Body.Close()
 
@@ -138,13 +140,16 @@ func (api API) GetTweet(id TweetID, cursor string) (TweetResponse, error) {
 
 	body, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error reading HTTP request:\n  %w", err)
 	}
 	log.Debug(string(body))
 
 	var response TweetResponse
 	err = json.Unmarshal(body, &response)
-	return response, err
+	if err != nil {
+		return response, fmt.Errorf("Error parsing API response for GetTweet(%d):\n  %w", id, err)
+	}
+	return response, nil
 }
 
 // Resend the request to get more replies if necessary
@@ -178,27 +183,26 @@ func UpdateQueryCursor(req *http.Request, new_cursor string, is_tweet bool) {
 	req.URL.RawQuery = query.Encode()
 }
 
-
 func (api API) GetUser(handle UserHandle) (APIUser, error) {
 	client := &http.Client{Timeout: 10 * time.Second}
 	req, err := http.NewRequest(
 		"GET",
-		"https://api.twitter.com/graphql/4S2ihIKfF3xhp-ENxvUAfQ/UserByScreenName?variables=%7B%22screen_name%22%3A%22" + string(handle) +
+		"https://api.twitter.com/graphql/4S2ihIKfF3xhp-ENxvUAfQ/UserByScreenName?variables=%7B%22screen_name%22%3A%22"+string(handle)+
 			"%22%2C%22withHighlightedLabel%22%3Atrue%7D",
 		nil)
 	if err != nil {
-		return APIUser{}, err
+		return APIUser{}, fmt.Errorf("Error initializing HTTP request:\n  %w", err)
 	}
 	err = ApiRequestAddTokens(req)
 	if err != nil {
-		return APIUser{}, err
+		return APIUser{}, fmt.Errorf("Error adding tokens to HTTP request:\n  %w", err)
 	}
 
 	var response UserResponse
 	for retries := 0; retries < 3; retries += 1 {
 		resp, err := client.Do(req)
 		if err != nil {
-			return APIUser{}, err
+			return APIUser{}, fmt.Errorf("Error executing HTTP request for GetUser(%s):\n  %w", handle, err)
 		}
 		defer resp.Body.Close()
 
@@ -214,13 +218,13 @@ func (api API) GetUser(handle UserHandle) (APIUser, error) {
 
 		body, err := ioutil.ReadAll(resp.Body)
 		if err != nil {
-			return APIUser{}, err
+			return APIUser{}, fmt.Errorf("Error retrieving API response to GetUser(%s):\n  %w", handle, err)
 		}
 		log.Debug(string(body))
 
 		err = json.Unmarshal(body, &response)
 		if err != nil {
-			return APIUser{}, err
+			return APIUser{}, fmt.Errorf("Error parsing API response to GetUser(%s):\n  %w", handle, err)
 		}
 
 		// Retry ONLY if the error is code 50 (random authentication failure), NOT on real errors
@@ -240,16 +244,16 @@ func (api API) Search(query string, cursor string) (TweetResponse, error) {
 	client := &http.Client{Timeout: 10 * time.Second}
 	req, err := http.NewRequest(
 		"GET",
-		"https://twitter.com/i/api/2/search/adaptive.json?count=50&spelling_corrections=1&query_source=typed_query&pc=1&q=" +
+		"https://twitter.com/i/api/2/search/adaptive.json?count=50&spelling_corrections=1&query_source=typed_query&pc=1&q="+
 			url.QueryEscape(query),
 		nil)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error initializing HTTP request:\n  %w", err)
 	}
 
 	err = ApiRequestAddTokens(req)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error adding tokens to HTTP request:\n  %w", err)
 	}
 
 	ApiRequestAddAllParams(req)
@@ -261,7 +265,7 @@ func (api API) Search(query string, cursor string) (TweetResponse, error) {
 
 	resp, err := client.Do(req)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error executing HTTP request for Search(%q):\n  %w", query, err)
 	}
 	defer resp.Body.Close()
 
@@ -275,13 +279,16 @@ func (api API) Search(query string, cursor string) (TweetResponse, error) {
 
 	body, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return TweetResponse{}, err
+		return TweetResponse{}, fmt.Errorf("Error retrieving API response for Search(%q):\n  %w", query, err)
 	}
 	// fmt.Println(string(body))
 
 	var response TweetResponse
 	err = json.Unmarshal(body, &response)
-	return response, err
+	if err != nil {
+		return response, fmt.Errorf("Error parsing API response to Search(%q):\n  %w", query, err)
+	}
+	return response, nil
 }
 
 func (api API) GetMoreTweetsFromSearch(query string, response *TweetResponse, max_results int) error {
@@ -311,10 +318,9 @@ func (api API) GetMoreTweetsFromSearch(query string, response *TweetResponse, ma
 	return nil
 }
 
-
 // Add Bearer token and guest token
 func ApiRequestAddTokens(req *http.Request) error {
-	req.Header.Set("Authorization", "Bearer " + BEARER_TOKEN)
+	req.Header.Set("Authorization", "Bearer "+BEARER_TOKEN)
 	req.Header.Set("x-twitter-client-language", "en")
 
 	guestToken, err := GetGuestToken()

scraper/api_types_v2.go

@@ -378,12 +378,12 @@ func (api API) GetGraphqlFeedFor(user_id UserID, cursor string) (APIV2Response,
 	client := &http.Client{Timeout: 10 * time.Second}
 	req, err := http.NewRequest("GET", get_graphql_user_timeline_url(user_id, cursor), nil)
 	if err != nil {
-		return APIV2Response{}, err
+		return APIV2Response{}, fmt.Errorf("Error initializing HTTP request:\n  %w", err)
 	}
 
 	err = ApiRequestAddTokens(req)
 	if err != nil {
-		return APIV2Response{}, err
+		return APIV2Response{}, fmt.Errorf("Error adding tokens to HTTP request:\n  %w", err)
 	}
 
 	if cursor != "" {
@@ -392,7 +392,7 @@ func (api API) GetGraphqlFeedFor(user_id UserID, cursor string) (APIV2Response,
 
 	resp, err := client.Do(req)
 	if err != nil {
-		return APIV2Response{}, err
+		return APIV2Response{}, fmt.Errorf("Error executing HTTP request:\n  %w", err)
 	}
 	defer resp.Body.Close()
 
@@ -410,13 +410,16 @@ func (api API) GetGraphqlFeedFor(user_id UserID, cursor string) (APIV2Response,
 
 	body, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return APIV2Response{}, err
+		return APIV2Response{}, fmt.Errorf("Error reading HTTP response body:\n  %w", err)
 	}
 	log.Debug(string(body))
 
 	var response APIV2Response
 	err = json.Unmarshal(body, &response)
-	return response, err
+	if err != nil {
+		return response, fmt.Errorf("Error parsing API response for GetGraphqlFeedFor(%d):\n  %w", user_id, err)
+	}
+	return response, nil
 }
 
 /**

scraper/guest_token.go

@@ -22,13 +22,13 @@ func GetGuestToken() (string, error) {
 	client := &http.Client{Timeout: 10 * time.Second}
 	req, err := http.NewRequest("POST", "https://api.twitter.com/1.1/guest/activate.json", nil)
 	if err != nil {
-		return "", err
+		return "", fmt.Errorf("Error initializing HTTP request:\n  %w", err)
 	}
-	req.Header.Set("Authorization", "Bearer " + BEARER_TOKEN)
+	req.Header.Set("Authorization", "Bearer "+BEARER_TOKEN)
 
 	resp, err := client.Do(req)
 	if err != nil {
-		return "", err
+		return "", fmt.Errorf("Error executing HTTP request:\n  %w", err)
 	}
 
 	defer resp.Body.Close()
@@ -43,12 +43,12 @@ func GetGuestToken() (string, error) {
 
 	body, err := ioutil.ReadAll(resp.Body)
 	if err != nil {
-		return "", err
+		return "", fmt.Errorf("Error reading HTTP response body:\n  %w", err)
 	}
 
 	err = json.Unmarshal(body, &guestToken)
 	if err != nil {
-		return "", err
+		return "", fmt.Errorf("Error parsing API response:\n  %w", err)
 	}
 
 	guestToken.RefreshedAt = time.Now()

scraper/timestamp_type.go

@@ -1,9 +1,9 @@
 package scraper
 
 import (
-	"time"
-	"fmt"
 	"database/sql/driver"
+	"fmt"
+	"time"
 )
 
 type Timestamp struct {
@@ -32,7 +32,7 @@ func TimestampFromString(s string) (Timestamp, error) {
 	if err == nil {
 		return Timestamp{tmp}, nil
 	}
-	return Timestamp{}, err
+	return Timestamp{}, fmt.Errorf("Error parsing timestamp:\n  %w", err)
 }
 
 func TimestampFromUnix(num int64) Timestamp {

scraper/tweet.go

@@ -200,7 +200,7 @@ func GetTweet(id TweetID) (Tweet, error) {
 	single_tweet, ok := tweet_response.GlobalObjects.Tweets[fmt.Sprint(id)]
 
 	if !ok {
-		return Tweet{}, fmt.Errorf("Didn't get the tweet!\n%v", tweet_response)
+		return Tweet{}, fmt.Errorf("Didn't get the tweet!")
 	}
 
 	return ParseSingleTweet(single_tweet)