2
hereのように「トークン検索(コードフロー)」を使用して、Reddit APIのOAuth2経由でアクセストークンを取得しています。私は "コード"文字列を取得することができましたが、アクセストークンを取得しようとするとunsupported_grant_typeエラーが発生します。私はこれを達成するためにRetrofit2を使用したいと思います。Reddit Api unsupported_grant_typeエラーRetrofit(java)
private void getAccessToken(String code) {
if (mRetrofit == null) {
mRetrofit = new Retrofit.Builder()
.baseUrl(RedditConstants.REDDIT_BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
Api api = mRetrofit.create(Api.class);
String authString = RedditConstants.REDDIT_CLIENT_ID + ":";
String encodedAuthString = Base64.encodeToString(authString.getBytes(), Base64.NO_WRAP);
Map<String, String> headers = new HashMap<>();
// headers.put("Content-Type", "application/x-www-form-urlencoded");
// headers.put("Accept", "application/json");
headers.put("Authorization", "Basic " + encodedAuthString);
headers.put("grant_type" , "authorization_code");
headers.put("code", code);
headers.put("redirect_uri", RedditConstants.REDDIT_REDIRECT_URL);
headers.put("User-Agent", RedditConstants.REDDIT_USER_AGENT);
Call<RedditAccessToken> call = api.login(headers, MediaType.parse("application/x-www-form-urlencoded"));
call.enqueue(new Callback<RedditAccessToken>() {
@Override
public void onResponse(Call<RedditAccessToken> call, Response<RedditAccessToken> response) {
Log.d("Findme", "body: " + response.body().toString());
Log.d("Findme", "response: " + response.toString());
}
@Override
public void onFailure(Call<RedditAccessToken> call, Throwable t) {
Log.e("Fineme", "onFailure: " + t.getMessage());
}
});
}
ログ結果:
D/Findme: body: RedditAccessToken{scope='null', token_type='null',
error='unsupported_grant_type', expires_in='0', access_token='null',
refresh_token='null'}
D/Findme: response: Response{protocol=h2, code=200, message=,
url=https://www.reddit.com/api/v1/access_token/}
改修インタフェース:
public interface Api {
@POST("access_token/")
Call<RedditAccessToken> login (
@HeaderMap Map<String, String> headers,
@Header("Content-Type") MediaType contentType
);
}
改修データモデル:
public class RedditAccessToken {
@SerializedName("scope")
@Expose
private String scope;
@SerializedName("token_type")
@Expose
private String token_type;
@SerializedName("expires_in")
@Expose
private long expires_in;
@SerializedName("access_token")
@Expose
private String access_token;
@SerializedName("refresh_token")
@Expose
private String refresh_token;
@SerializedName("error")
@Expose
private String error;
public String getScope() {
return scope;
}
public String getRefresh_token() {
return refresh_token;
}
public void setRefresh_token(String refresh_token) {
this.refresh_token = refresh_token;
}
public void setScope(String scope) {
this.scope = scope;
}
public String getToken_type() {
return token_type;
}
public void setToken_type(String token_type) {
this.token_type = token_type;
}
public long getExpires_in() {
return expires_in;
}
public void setExpires_in(long expires_in) {
this.expires_in = expires_in;
}
public String getAccess_token() {
return access_token;
}
public void setAccess_token(String access_token) {
this.access_token = access_token;
}
@Override
public String toString() {
return "RedditAccessToken{" +
"scope='" + scope + '\'' +
", token_type='" + token_type + '\'' +
", error='" + error + '\'' +
", expires_in='" + expires_in + '\'' +
", access_token='" + access_token + '\'' +
", refresh_token='" + refresh_token + '\'' +
'}';
}
public String getError() {
return error;
}
public void setError(String error) {
this.error = error;
}
}