Question

我有点问题。我试图从APEX应用程序下载文件。文件正确下载，但浏览器无法将文件识别为PDF。下面的代码完美无缺，但缺乏对文件类型的识别。

create or replace PROCEDURE DOWNLOAD_LIST
   (p_id_list in VARCHAR2) AS
   v_mime  VARCHAR2(2000);
   v_length  NUMBER;
   v_file_name VARCHAR2(2000);
   Lob_loc  BLOB;
BEGIN
   SELECT MIME_TYPE, BLOB_CONTENT, CODI ,DBMS_LOB.GETLENGTH(blob_content)   
   INTO v_mime,lob_loc,v_file_name,v_length
   FROM table
   WHERE ID_LIST = p_id_list;

   -- set up HTTP header
   -- use an NVL around the mime type and 
   -- if it is a null set it to application/octect
   -- application/octect may launch a download window from windows

   -- I've tried to put either pdf or octet. The database file has 'application/pdf' as mime_type
   owa_util.mime_header( nvl(v_mime,'application/pdf'), FALSE );      
   -- set the size so the browser knows how much to download
   htp.p('Content-length: ' || v_length);
   -- the filename will be used by the browser if the users does a save as
   --htp.p('Content-Disposition:  attatchment; filename="'||replace(replace(substr(v_file_name,instr(v_file_name,'/')+1),chr(10),null),chr(13),null)|| '"');
   htp.p('Content-Disposition: attatchment; filename="'||v_file_name||'.pdf'||'"');
   -- close the headers            
   owa_util.http_header_close;
   -- download the BLOB
   wpg_docload.download_file( Lob_loc );
end DOWNLOAD_LIST;

任何帮助？

Answer 1

不是那么简单;要求您采取一些额外步骤，如Creating PDF Reports with Oracle Application Express 5.0 and Oracle REST Data Services中所述。看一下，该教程需要20分钟才能完成。我希望它会有所帮助。

Answer 2

我认为您的内容长度存在轻微问题：

这是我在制作中的代码，它确实使用浏览器内置的查看器正确显示.pdf文件：

PROCEDURE   PR_SHOW_REPORT(io_blReport            IN OUT BLOB,
                       i_vcContentDisposition IN VARCHAR2 DEFAULT 'inline',
                       i_vcFilename           IN VARCHAR2 DEFAULT 'reportresult.pdf') IS
 l_mime        VARCHAR2 (255);
 l_length      NUMBER;
 l_file_name   VARCHAR2 (2000);
 lob_loc       BLOB;
BEGIN
 OWA_UTIL.mime_header ('application/pdf', FALSE);
 HTP.p ('Content-Length: ' || DBMS_LOB.GETLENGTH(io_blReport));
 HTP.p ('Content-Disposition: ' || i_vcContentDisposition ||'; filename="' || i_vcFilename || '"');
 OWA_UTIL.http_header_close;
 WPG_DOCLOAD.download_file(io_blReport);
END;

未从APEX正确下载文件

2 个答案: