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package main
import (
"crypto/hmac"
"crypto/sha1"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"math/rand"
"net/http"
"net/url"
"sort"
"strconv"
"strings"
"time"
)
const apiBase = "https://api.tumblr.com/v2"
const oauthBase = "https://www.tumblr.com"
type TumblrClient struct {
ConsumerKey string
ConsumerSecret string
Token string
TokenSecret string
}
func NewClient(ck, cs, token, secret string) *TumblrClient {
return &TumblrClient{ck, cs, token, secret}
}
// --- OAuth 1.0a ---
func oauthNonce() string {
b := make([]byte, 16)
rand.Read(b)
return base64.StdEncoding.EncodeToString(b)
}
func oauthTimestamp() string {
return strconv.FormatInt(time.Now().Unix(), 10)
}
func hmacSha1(key, data string) string {
mac := hmac.New(sha1.New, []byte(key))
mac.Write([]byte(data))
return base64.StdEncoding.EncodeToString(mac.Sum(nil))
}
func (c *TumblrClient) oauthHeader(method, rawURL string, extraParams map[string]string) string {
params := map[string]string{
"oauth_consumer_key": c.ConsumerKey,
"oauth_nonce": oauthNonce(),
"oauth_signature_method": "HMAC-SHA1",
"oauth_timestamp": oauthTimestamp(),
"oauth_token": c.Token,
"oauth_version": "1.0",
}
for k, v := range extraParams {
params[k] = v
}
// Build base string
keys := make([]string, 0, len(params))
for k := range params {
keys = append(keys, k)
}
sort.Strings(keys)
parts := make([]string, 0, len(keys))
for _, k := range keys {
parts = append(parts, url.QueryEscape(k)+"="+url.QueryEscape(params[k]))
}
paramStr := strings.Join(parts, "&")
baseStr := method + "&" + url.QueryEscape(rawURL) + "&" + url.QueryEscape(paramStr)
sigKey := url.QueryEscape(c.ConsumerSecret) + "&" + url.QueryEscape(c.TokenSecret)
params["oauth_signature"] = hmacSha1(sigKey, baseStr)
// Build header
headerParts := []string{}
for k, v := range params {
if strings.HasPrefix(k, "oauth_") {
headerParts = append(headerParts, k+`="`+url.QueryEscape(v)+`"`)
}
}
sort.Strings(headerParts)
return "OAuth " + strings.Join(headerParts, ", ")
}
func (c *TumblrClient) get(endpoint string, params map[string]string) ([]byte, error) {
u, _ := url.Parse(apiBase + endpoint)
q := u.Query()
for k, v := range params {
q.Set(k, v)
}
u.RawQuery = q.Encode()
rawURL := apiBase + endpoint
req, _ := http.NewRequest("GET", u.String(), nil)
req.Header.Set("Authorization", c.oauthHeader("GET", rawURL, params))
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
return io.ReadAll(resp.Body)
}
func (c *TumblrClient) post(endpoint string, params map[string]string) ([]byte, error) {
form := url.Values{}
for k, v := range params {
form.Set(k, v)
}
rawURL := apiBase + endpoint
req, _ := http.NewRequest("POST", rawURL, strings.NewReader(form.Encode()))
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.Header.Set("Authorization", c.oauthHeader("POST", rawURL, params))
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
return io.ReadAll(resp.Body)
}
// --- OAuth token exchange (no client tokens yet) ---
func oauthRequest(method, rawURL string, consumerKey, consumerSecret, token, tokenSecret string, params map[string]string) ([]byte, error) {
c := &TumblrClient{consumerKey, consumerSecret, token, tokenSecret}
if method == "POST" {
return c.post(strings.TrimPrefix(rawURL, apiBase), params)
}
return c.get(strings.TrimPrefix(rawURL, apiBase), params)
}
func GetRequestToken(consumerKey, consumerSecret string) (string, string, error) {
c := &TumblrClient{ConsumerKey: consumerKey, ConsumerSecret: consumerSecret}
rawURL := oauthBase + "/oauth/request_token"
req, _ := http.NewRequest("POST", rawURL, nil)
req.Header.Set("Authorization", c.oauthHeader("POST", rawURL, nil))
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", "", err
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
vals, _ := url.ParseQuery(string(body))
return vals.Get("oauth_token"), vals.Get("oauth_token_secret"), nil
}
func GetAccessToken(consumerKey, consumerSecret, tmpToken, tmpSecret, verifier string) (string, string, error) {
c := &TumblrClient{ConsumerKey: consumerKey, ConsumerSecret: consumerSecret, Token: tmpToken, TokenSecret: tmpSecret}
rawURL := oauthBase + "/oauth/access_token"
req, _ := http.NewRequest("POST", rawURL, strings.NewReader("oauth_verifier="+url.QueryEscape(verifier)))
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.Header.Set("Authorization", c.oauthHeader("POST", rawURL, map[string]string{"oauth_verifier": verifier}))
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", "", err
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
vals, _ := url.ParseQuery(string(body))
return vals.Get("oauth_token"), vals.Get("oauth_token_secret"), nil
}
// --- API response types ---
type Post struct {
ID json.Number `json:"id"`
IDString string `json:"id_string"`
Type string `json:"type"`
BlogName string `json:"blog_name"`
PostURL string `json:"post_url"`
ReblogKey string `json:"reblog_key"`
NoteCount int `json:"note_count"`
Liked bool `json:"liked"`
Photos []struct {
OriginalSize struct {
URL string `json:"url"`
} `json:"original_size"`
} `json:"photos"`
VideoURL string `json:"video_url"`
ThumbnailURL string `json:"thumbnail_url"`
Caption string `json:"caption"`
}
type UserInfo struct {
Response struct {
User struct {
Blogs []struct {
Name string `json:"name"`
} `json:"blogs"`
} `json:"user"`
}
}
type PostsResponse struct {
Response struct {
Posts []Post `json:"posts"`
}
}
type TaggedResponse struct {
Response []Post
}
// --- API methods ---
func (c *TumblrClient) GetUserInfo() (*UserInfo, error) {
body, err := c.get("/user/info", nil)
if err != nil {
return nil, err
}
var result UserInfo
if err := json.Unmarshal(body, &result); err != nil {
return nil, err
}
return &result, nil
}
func (c *TumblrClient) GetDashboard(offset, limit int, postType string) ([]Post, error) {
params := map[string]string{
"offset": strconv.Itoa(offset),
"limit": strconv.Itoa(limit),
"type": postType,
}
body, err := c.get("/user/dashboard", params)
if err != nil {
return nil, err
}
var result PostsResponse
if err := json.Unmarshal(body, &result); err != nil {
return nil, fmt.Errorf("parse error: %w — body: %s", err, string(body))
}
return result.Response.Posts, nil
}
func (c *TumblrClient) GetBlogPosts(blogName string, offset, limit int, postType string) ([]Post, error) {
params := map[string]string{
"offset": strconv.Itoa(offset),
"limit": strconv.Itoa(limit),
"type": postType,
}
body, err := c.get("/blog/"+blogName+".tumblr.com/posts", params)
if err != nil {
return nil, err
}
var result PostsResponse
if err := json.Unmarshal(body, &result); err != nil {
return nil, fmt.Errorf("parse error: %w — body: %s", err, string(body))
}
return result.Response.Posts, nil
}
func (c *TumblrClient) GetTagged(tag string) ([]Post, error) {
body, err := c.get("/tagged", map[string]string{"tag": tag})
if err != nil {
return nil, err
}
// Tagged endpoint returns array directly under response
var raw struct {
Response []Post `json:"response"`
}
if err := json.Unmarshal(body, &raw); err != nil {
return nil, err
}
return raw.Response, nil
}
func (c *TumblrClient) LikePost(id, reblogKey string) error {
_, err := c.post("/user/like", map[string]string{"id": id, "reblog_key": reblogKey})
return err
}
func (c *TumblrClient) UnlikePost(id, reblogKey string) error {
_, err := c.post("/user/unlike", map[string]string{"id": id, "reblog_key": reblogKey})
return err
}
func (c *TumblrClient) ReblogPost(nativeBlog, id, reblogKey, sourceBlog string) error {
_, err := c.post("/blog/"+nativeBlog+".tumblr.com/post/reblog", map[string]string{
"id": id,
"reblog_key": reblogKey,
})
return err
}
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