英文:
How to URL Safe decode Base64 in Go, encoded in Perl?
问题
我有一个URL安全编码的字符串（由Perl生成），我需要在Go中解码它。
这里有两个程序，一个是Perl，一个是Go - Perl可以正常工作，但是Go会出错。
我无法理解这个问题。
请帮忙！
=== Perl代码 - 正常工作
#!/usr/bin/env perluse common::sense;use MIME::Base64::URLSafe;my $str = 'Oi6cQzmolrUhkgHsNehtj9p_OsasB_6CIeygK0owoxTsXCtVWyQi-7DXxIJiaV-kSc6PGNC6uNz5V0A9QOGCaeCy6PolQY2Lt_v4JM42VEbsuML8guHfMO0ydvbXVcCR-yLfkz5CO0f-P1hVqxJBD8qPvk1t1DRzqmHP41DSfIm_WzlhtITnd_Wjt6E3CFS78HL3XjJlM-QBW9Z_GZgic8y7TlOWFzCRUf2Q-EZschrDi9l81E93XBNKe8knInL_uFN_oK_ob7fjnkGJO54RNn3coVsrzuIoNa6AI6oWLfsaJ5NyQYor5P0';say urlsafe_b64decode($str);
=== Go代码 - 出错
package mainimport (b64 "encoding/base64""fmt")func main() {str := "Oi6cQzmolrUhkgHsNehtj9p_OsasB_6CIeygK0owoxTsXCtVWyQi-7DXxIJiaV-kSc6PGNC6uNz5V0A9QOGCaeCy6PolQY2Lt_v4JM42VEbsuML8guHfMO0ydvbXVcCR-yLfkz5CO0f-P1hVqxJBD8qPvk1t1DRzqmHP41DSfIm_WzlhtITnd_Wjt6E3CFS78HL3XjJlM-QBW9Z_GZgic8y7TlOWFzCRUf2Q-EZschrDi9l81E93XBNKe8knInL_uFN_oK_ob7fjnkGJO54RNn3coVsrzuIoNa6AI6oWLfsaJ5NyQYor5P0"fmt.Println("source B64:", str)_, err := b64.URLEncoding.DecodeString(str)if err != nil {fmt.Println("error b64:", err)}}
=== 结束
由于解码返回的结果被截断，因此无法在下一步中使用它。
英文:
I have an URL Safe encoded string (produced by Perl), that I need to decode in Go.
Here are two programs, in Perl and in Go - Perl works fine, but Go rises error.
I can't understand it.
Please help!
=== Perl code - works fine
#!/usr/bin/env perluse common::sense;use MIME::Base64::URLSafe;my $str = 'Oi6cQzmolrUhkgHsNehtj9p_OsasB_6CIeygK0owoxTsXCtVWyQi-7DXxIJiaV-kSc6PGNC6uNz5V0A9QOGCaeCy6PolQY2Lt_v4JM42VEbsuML8guHfMO0ydvbXVcCR-yLfkz5CO0f-P1hVqxJBD8qPvk1t1DRzqmHP41DSfIm_WzlhtITnd_Wjt6E3CFS78HL3XjJlM-QBW9Z_GZgic8y7TlOWFzCRUf2Q-EZschrDi9l81E93XBNKe8knInL_uFN_oK_ob7fjnkGJO54RNn3coVsrzuIoNa6AI6oWLfsaJ5NyQYor5P0';say urlsafe_b64decode($str);
=== Go code - rises error
package mainimport (b64 "encoding/base64""fmt")func main() {str := "Oi6cQzmolrUhkgHsNehtj9p_OsasB_6CIeygK0owoxTsXCtVWyQi-7DXxIJiaV-kSc6PGNC6uNz5V0A9QOGCaeCy6PolQY2Lt_v4JM42VEbsuML8guHfMO0ydvbXVcCR-yLfkz5CO0f-P1hVqxJBD8qPvk1t1DRzqmHP41DSfIm_WzlhtITnd_Wjt6E3CFS78HL3XjJlM-QBW9Z_GZgic8y7TlOWFzCRUf2Q-EZschrDi9l81E93XBNKe8knInL_uFN_oK_ob7fjnkGJO54RNn3coVsrzuIoNa6AI6oWLfsaJ5NyQYor5P0"fmt.Println("source B64:", str)_, err := b64.URLEncoding.DecodeString(str)if err != nil {fmt.Println("error b64:", err)}}
=== END
As decode returns truncated result it is impossible to use it in next step.
答案1
得分: 11
当没有填充时，请使用RawURLEncoding：
_, err := b64.RawURLEncoding.DecodeString(str)
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