[GitHub] [jena] afs commented on issue #1259: regression when query is sent as POST

[GitBox <gi...@apache.org>]

afs commented on issue #1259:
URL: https://github.com/apache/jena/issues/1259#issuecomment-1100607544

   Hi @LorenzBuehmann ,
   
   I vaguely (it was a very long time ago!) recall this coming up before. A difference now is that the only site this affects is likely to be wikidata (and then, only for now).
   
   Here is a MVCE:
   ```java
       public static void main(String...args) {
           // U00E7
           String qs = "SELECT ?x { BIND('Curaçao' As ?x) }";
           String qsx = "SELECT ?x { BIND('Cura\\u00E7ao' As ?x) }";
   
           RowSet rowSet = QueryExecHTTP
                   .service("https://query.wikidata.org/sparql")
                   //.sendMode(QuerySendMode.asPostForm)
                   //.sendMode(QuerySendMode.asPost)
                   .sendMode(QuerySendMode.asGetAlways)
                   .queryString(qs)
                   .select();
           RowSetOps.out(rowSet);
       }
   ```
   After checking, the corruption is on the request receiving and `qsx` works in all three cases.
   
   The three different sendModes give three different results.
   
   * `asGetAlways` works
   * `asPost` is corrupted in a way that looks like UTF-8 read as ISO-8859-?
   * `asPostForm` is a different corruption, not sure what and that might be Jena.
   
   I don't know why ISO-8859 is being used if their servers are Linux (system default). It hints it is a choice in the Blazegraph code.
   


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