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EBS开发附件上传和下载功能
上传
Oracle ERP二次开发中使用的方式有两种，一是通过标准功能，在系统管理员中定义即可，不用写代码，就可以使几乎任何Form具有附件功能，具体参考系统管理员文档；二是通过PL/SQL Gateway，需要我们便写代码完成。该方式其实和上述方式一的后台实现是一样的
程序说明
1、Package功能，测试通过PL/SQLGateway（MOD PL/SQL）完成文件上传下载
2、本Package直接使用EBS的DAD，所以对应的Document表为APPS.fnd_lobs_document
在非EBS环境开发，需要自己定义DAD请参考9ias_plsql.pdf和9ias.pdf，步骤如下
a、创建Document表，参照fnd_lobs_document和fnd_lobs_documentpart，表名自己起
b、配置DAD，配置文件为$IAS_ORACLE_HOME/Apache/modplsql/cfg/wdbsvr.app
c、参照fnd_gfm，改写成自己的包，或者简单点改写本Package也行
3、需要把我们写的包在system administrator--> security --> Web PL/SQL里面注册一下，
不然通过IE打开会提示用户名和密码
4、本测试把在“接口”fnd_lobs_document中的附件，按照EBS的做法保存到fnd_lobs，
也可以改写代码保存到自己的表，一般没必要，我们自己的表保存File_ID即可
5、一个表中的BLOB等数据可以直接插入另一个表
下载
上传的文件时存到了fnd_lobs表中以BLOB数据的形式存储，现在要把BLOB数据以原文件的格式读取出来，并且给最终用户提供下载该文件的功能
方法如下:
DECLARE v_file_id NUMBER; url VARCHAR2(500); BEGIN --Get the file_id of the file which you want to download in fnd_lobs v_file_id := xxxxxx; --Get The Download URL url := fnd_gfm.construct_download_url(fnd_web_config.gfm_agent, v_file_id, TRUE); fnd_utilities.open_url(url); END;
以上的方法就可以轻松的实现下载存储在fnd_lobs中的文件，只要告诉fnd_gfm.construct_download_url在fnd_lobs表中文件的file_id，就可以轻松取得URL，使用fnd_utilities.open_url就可以下载该文件；不过现在还有一个问题就是要在工作流发送的消息找到一个东西（比如说一个按钮、超链接）来执行下载文件的方法可以在document类型的ATTRIBUTE里设置一个超链接，然后让这个超链接的地址指向我已经取得的下载文件的URL
CREATE OR REPLACE PACKAGE cux_oracle_up_down_pkg AUTHID CURRENT_USER IS /******************************************** 1、Package功能，测试通过PL/SQL Gateway（MOD PL/SQL）完成文件上传下载 2、本Package直接使用EBS的DAD，所以对应的Document表为APPS.fnd_lobs_document 在非EBS环境开发，需要自己定义DAD请参考9ias_plsql.pdf和9ias.pdf，步骤如下 1、创建Document表，参照fnd_lobs_document和fnd_lobs_documentpart，表名自己起 2、配置DAD，配置文件为$IAS_ORACLE_HOME/Apache/modplsql/cfg/wdbsvr.app 3、参照fnd_gfm，改写成自己的包，或者简单点改写本Package也行 3、需要把我们写的包在system administrator --> security --> Web PL/SQL里面注册一下， 不然通过IE打开会提示用户名和密码 4、本测试把在“接口”fnd_lobs_document中的附件，按照EBS的做法保存到fnd_lobs， 也可以改写代码保存到自己的表，一般没必要，我们自己的表保存File_ID即可 5、一个表中的BLOB等数据可以直接插入另一个表 ********************************************/ /***************上传文件下载过程************* 1、初始化access id select fnd_gfm.authorize(-1) from dual; 2、准备url，下面是例子 SELECT fnd_web_config.trail_slash(fnd_profile.VALUE('APPS_WEB_AGENT')) || 'oracle_up_down.upload_form?p_access_id=上面1的查询结果' FROM dual; 3、用浏览器打开url即可。如果是通过Form打开url上传，那么把上面代码放入form的相应trigger 4、查看File_ID SELECT fnd_web_config.trail_slash(fnd_profile.VALUE('APPS_WEB_AGENT')) || 'oracle_up_down.upload_form?p_access_id=上面1的查询结果' FROM dual; 4、把文件下载下来验证 SELECT fnd_web_config.trail_slash(fnd_profile.VALUE('APPS_WEB_AGENT')) || 'oracle_up_down.download_file?p_file_id=上面4的查询结果' || chr(38) || 'p_access_id=上面1的查询结果' FROM dual; 5、可以直接在PL/SQL Developer 6以上中Select出来点击File_Data察看 Test脚本 http://hw321.huawei.com:8003/pls/scp/fnd_web.SHOWENV; select fnd_gfm.authorize(-1) from dual; select * from applsys.fnd_lob_access t where t.access_id = 354896931892; http://hw321.huawei.com:8003/pls/SCP/oracle_up_down.upload_form?p_access_id=354896931892; select * from applsys.fnd_lob_access t where t.access_id = 354896931892; select * from applsys.fnd_lobs_document t; http://hw321.huawei.com:8003/pls/SCP/oracle_up_down.download_file?p_file_id=3548970&p_access_id=354896931892; Select * from fnd_lobs flb where flb.file_id = 3548970; ****************上传文件下载过程*****************/ g_agent CONSTANT VARCHAR2(100) := fnd_web_config.trail_slash(fnd_profile.value('APPS_WEB_AGENT')); g_package_name CONSTANT VARCHAR2(100) := 'oracle_up_down'; g_upload_url CONSTANT VARCHAR2(100) := g_package_name || '.upload_file'; g_download_url CONSTANT VARCHAR2(100) := g_package_name || '.download_file'; g_cancel_url CONSTANT VARCHAR2(100) := g_package_name || '.cancel_file'; --完成上传：把在网关中的数据抓到自己的表 PROCEDURE upload_file(p_file_name IN VARCHAR2, p_access_id IN NUMBER); --显示HTML取消页面 PROCEDURE upload_cancel; --显示HTML上传页面 PROCEDURE upload_form(p_access_id IN NUMBER DEFAULT NULL); --下载文件 PROCEDURE download_file(p_file_id IN NUMBER, p_access_id IN NUMBER, p_purge IN VARCHAR2 DEFAULT NULL); PROCEDURE download_file_html(p_file_id IN NUMBER, p_access_id IN NUMBER, p_purge IN VARCHAR2 DEFAULT NULL); END;
CREATE OR REPLACE PACKAGE BODY cux_oracle_up_down_pkg IS --add '/' to a string FUNCTION trail_slash(p_val IN VARCHAR2) RETURN VARCHAR2 IS l_copy_val VARCHAR2(2000); BEGIN l_copy_val := p_val; WHILE (substr(l_copy_val, -1, 1) = '/') LOOP l_copy_val := substr(l_copy_val, 1, length(l_copy_val) - 1); END LOOP; RETURN l_copy_val || '/'; END; PROCEDURE err_msg(NAME VARCHAR2) IS BEGIN fnd_message.set_name('FND', 'SQL_PLSQL_ERROR'); fnd_message.set_token('ROUTINE', 'FND_GFM.' || NAME); fnd_message.set_token('ERRNO', SQLCODE); fnd_message.set_token('REASON', SQLERRM); END err_msg; /* 从fnd_gfm拷贝过来，原来的代码是删除整个fnd_lobs_document，不知道为何，现在改为仅删除上传的文件 */ FUNCTION confirm_upload(access_id NUMBER, file_name VARCHAR2, program_name VARCHAR2 DEFAULT NULL, program_tag VARCHAR2 DEFAULT NULL, expiration_date DATE DEFAULT NULL, LANGUAGE VARCHAR2 DEFAULT userenv('LANG'), wakeup BOOLEAN DEFAULT FALSE) RETURN NUMBER IS fid NUMBER := -1; fn VARCHAR2(256); mt VARCHAR2(240); bloblength NUMBER; -- bug 3045375, added variable to set length of blob. BEGIN IF (fnd_gfm.authenticate(confirm_upload.access_id)) THEN SELECT fnd_lobs_s.nextval INTO fid FROM dual; fn := substr(confirm_upload.file_name, instr(confirm_upload.file_name, '/') + 1); -- bug 3045375, added select to get length of BLOB. SELECT dbms_lob.getlength(blob_content), mime_type INTO bloblength, mt FROM fnd_lobs_document WHERE NAME = confirm_upload.file_name AND rownum = 1; -- bug 3045375, added if to check length of blob. IF bloblength > 0 THEN INSERT INTO fnd_lobs (file_id, file_name, file_content_type, file_data, upload_date, expiration_date, program_name, program_tag, LANGUAGE, file_format) (SELECT confirm_upload.fid, fn, ld.mime_type, ld.blob_content, SYSDATE, confirm_upload.expiration_date, confirm_upload.program_name, confirm_upload.program_tag, confirm_upload.language, fnd_gfm.set_file_format(mt) FROM fnd_lobs_document ld WHERE ld.name = confirm_upload.file_name AND rownum = 1); IF (SQL%ROWCOUNT <> 1) THEN RAISE no_data_found; END IF; UPDATE fnd_lob_access SET file_id = fid WHERE access_id = confirm_upload.access_id; IF wakeup THEN dbms_alert.signal('FND_GFM_ALERT' || to_char(access_id), to_char(fid)); END IF; -- bug 3045375, added else to return fid = -2. ELSE fid := -2; END IF; DELETE FROM fnd_lobs_document ld WHERE ld.name = confirm_upload.file_name; --delete from fnd_lobs_documentpart; END IF; RETURN fid; EXCEPTION WHEN OTHERS THEN DELETE FROM fnd_lobs_document ld WHERE ld.name = confirm_upload.file_name; --delete from fnd_lobs_documentpart; err_msg('confirm_upload'); RAISE; END; PROCEDURE upload_file(p_file_name IN VARCHAR2, p_access_id IN NUMBER) IS l_file_id NUMBER; BEGIN l_file_id := confirm_upload(access_id => p_access_id, file_name => p_file_name, program_name => g_package_name); IF l_file_id NOT IN (-1, -2) THEN -- File upload completed htp.htmlopen; htp.headopen; htp.title('文件上传'); htp.headclose; htp.bodyopen; htp.img2('/images/wwcban.jpg', calign => 'Center', calt => 'Logo'); htp.br; htp.br; htp.p('<h4>' || '文件上传' || '</h4>'); htp.hr; htp.p(htf.bold('文件上传完成。Select * from fnd_lobs flb where flb.file_id = ' || l_file_id)); htp.br; htp.p('<h4>' || '请关闭浏览器！' || '</h4>'); htp.br; htp.bodyclose; htp.htmlclose; ELSE -- File upload failed. htp.htmlopen; htp.headopen; htp.title('文件上传'); htp.headclose; htp.bodyopen; htp.img2('/images/wwcban.jpg', calign => 'Left', calt => 'Logo'); htp.br; htp.hr; htp.p(htf.bold('文件上传失败！')); htp.br; htp.bodyclose; htp.htmlclose; END IF; END; PROCEDURE upload_cancel AS BEGIN -- Show a message page htp.htmlopen; htp.headopen; htp.title('取消文件上传'); htp.headclose; htp.bodyopen; htp.img2('/images/wwcban.jpg', calign => 'Center', calt => 'Logo'); htp.br; htp.br; htp.p('<h4>' || '文件上传' || '</h4>'); htp.hr; htp.p(htf.bold('取消文件上传')); htp.br; htp.p('<h4>' || '您已经选择取消文件上传。' || '</h4>'); htp.p('<h4>' || '请关闭浏览器！' || '</h4>'); htp.br; htp.br; htp.br; htp.bodyclose; htp.htmlclose; END; PROCEDURE upload_form(p_access_id IN NUMBER DEFAULT NULL) IS l_upload_action VARCHAR2(2000); BEGIN -- Set the upload action l_upload_action := fnd_gfm.construct_upload_url(g_agent, g_upload_url, p_access_id); -- Set page title and toolbar. htp.htmlopen; htp.headopen; htp.p('<SCRIPT LANGUAGE="JavaScript">'); htp.p(' function processclick (cancel_url) { if (confirm(' || '"' || '取消文件上传' || '"' || ')) { parent.location=cancel_url } }'); htp.print('</SCRIPT>'); htp.title('文件上传'); htp.headclose; htp.bodyopen; htp.img2('/images/wwcban.jpg', calign => 'Center', calt => 'Logo'); htp.br; htp.br; htp.p('<h4>' || '文件上传' || '</h4>'); htp.hr; htp.br; htp.print('</LEFT>'); htp.formopen(curl => l_upload_action, cmethod => 'POST', cenctype => 'multipart/form-data'); htp.tableopen(cattributes => ' border=0 cellpadding=2 cellspacing=0'); htp.tablerowopen; htp.tablerowclose; htp.tablerowopen(cvalign => 'TOP'); htp.p('<TD>'); htp.p('</TD>'); htp.p('<label>文件</label>'); htp.tabledata('<INPUT TYPE="File" NAME="p_file_name" SIZE="60">', calign => 'left'); htp.tablerowclose; htp.tableclose; -- Send access is as a hidden value htp.formhidden(cname => 'p_access_id', cvalue => to_char(p_access_id)); htp.br; htp.tableopen(cattributes => ' border=0 cellpadding=2 cellspacing=0'); htp.tablerowopen(cvalign => 'TOP'); htp.tabledata('<INPUT TYPE="Submit" VALUE="' || '确定' || '" SIZE="50">', calign => 'left'); htp.tabledata('<INPUT TYPE="Button" NAME="cancel" VALUE="' || '取消' || '"' || ' onClick="processclick(''' || g_cancel_url || ''') " SIZE="50">', calign => 'left'); htp.tablerowclose; htp.tableclose; htp.formclose; htp.bodyclose; htp.htmlclose; END; PROCEDURE download_file(p_file_id IN NUMBER, p_access_id IN NUMBER, p_purge IN VARCHAR2 DEFAULT NULL) IS BEGIN fnd_gfm.download(p_file_id, p_access_id, p_purge); END; PROCEDURE download_file_html(p_file_id IN NUMBER, p_access_id IN NUMBER, p_purge IN VARCHAR2 DEFAULT NULL) IS BEGIN htp.print(' <html> <body> <img src=' || g_download_url || '?p_file_id=' || p_file_id || chr(38) || 'p_access_id=' || p_access_id || ' border=0> </body> </html> '); END; END;
