✨ feat(integration decoders): http and glimpse_detector

compile pass, todo test

test/http_decoder/base64.h

@@ -0,0 +1,28 @@
+#ifndef BASE64_H
+#define BASE64_H
+
+#define BASE64_ENCODE_OUT_SIZE(s) ((unsigned int)((((s) + 2) / 3) * 4 + 1))
+#define BASE64_DECODE_OUT_SIZE(s) ((unsigned int)(((s) / 4) * 3))
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif    
+/*
+ * out is null-terminated encode string.
+ * return values is out length, exclusive terminating `\0'
+ */
+unsigned int
+base64_encode(const unsigned char *in, unsigned int inlen, char *out);
+
+/*
+ * return values is out length
+ */
+unsigned int
+base64_decode(const char *in, unsigned int inlen, unsigned char *out);
+
+#ifdef __cplusplus
+}
+#endif    
+
+#endif /* BASE64_H */