oracle - PL/SQL : UTL_HTTP POST with UTF8 string results in broken characters

Question

我想通过 utl_http 将 UTF8 json 字符串通过 POST 发送到 node.js 服务器。发送字符串

["Sant Julià de Lòria"]

如实到达

["Sant Juli� de L�ria"]

PL/SQL 代码如下:

FUNCTION http_post_varchar(
    p_url          VARCHAR2,
    p_request_body VARCHAR2 )
  RETURN VARCHAR2
AS
  req   UTL_HTTP.REQ;
  resp  UTL_HTTP.RESP;
  value VARCHAR2(32767);  -- URL to post to
  v_url VARCHAR2(200) := p_url;
  -- Post Parameters
  v_param VARCHAR2(32767) := p_request_body;
  v_param_length NUMBER := length(v_param);
BEGIN
  req := UTL_HTTP.BEGIN_REQUEST (url=> v_url, method => 'POST');
  UTL_HTTP.SET_HEADER (r      =>  req,
                       name   =>  'Content-Type',
                       value  =>  'application/json;charset=UTF-8');
  UTL_HTTP.SET_HEADER (r      =>   req,
                       name   =>   'Content-Length',
                       value  =>   v_param_length);
  UTL_HTTP.WRITE_TEXT (r      =>   req,
                       data   =>   v_param);

  resp := UTL_HTTP.GET_RESPONSE(req);
  LOOP
    UTL_HTTP.READ_LINE(resp, value, TRUE);    
  END LOOP;
  UTL_HTTP.END_RESPONSE(resp);
  RETURN 'OK';
EXCEPTION
  WHEN UTL_HTTP.END_OF_BODY THEN
    UTL_HTTP.END_RESPONSE(resp);
  RETURN 'OK';
END http_post_varchar;

Answer 1

您应该将代码更改为:

UTL_HTTP.SET_BODY_CHARSET('UTF-8');
UTL_HTTP.SET_HEADER (r      =>   req,
                     name   =>   'Content-Length',
                     value  =>    LENGTHB(v_param));

UTL_HTTP.WRITE_RAW (r    => req,
                    data => UTL_RAW.CAST_TO_RAW(v_param));

由于 UTF-8，LENGTHB 表示字节长度。否则，计算出的长度将为错误，并且您会在目标端出现错误(输入意外结束 或其他)。