oracle 9i 调用web service
ORACLE 自 9i 起,允许使用 UTL_HTTP 包进行访问网络,可以直接在 ORACLE 中发起 WEB SERVICE 调用,经测试该方法在oracle 10g中同样适用.
操作步骤如下:
1。首先导入 soap_api 包,在toad中直接execute as script就可以了
CREATE OR REPLACE PACKAGE soap_api AS
-- --------------------------------------------------------------------------
-- Name : http://www.oracle-base.com/dba/miscellaneous/soap_api
-- Author : DR Timothy S Hall
-- Description : SOAP related functions for consuming web services.
-- Ammedments :
-- When Who What
-- =========== ======== =================================================
-- 04-OCT-2003 Tim Hall Initial Creation
-- 23-FEB-2006 Tim Hall Parameterized the "soap" envelope tags.
-- --------------------------------------------------------------------------
TYPE t_request IS RECORD (
method VARCHAR2(256),
namespace VARCHAR2(256),
body VARCHAR2(32767),
envelope_tag VARCHAR2(30)
);
TYPE t_response IS RECORD
(
doc XMLTYPE,
envelope_tag VARCHAR2(30)
);
FUNCTION new_request(p_method IN VARCHAR2,
p_namespace IN VARCHAR2,
p_envelope_tag IN VARCHAR2 DEFAULT 'SOAP-ENV')
RETURN t_request;
PROCEDURE add_parameter(p_request IN OUT NOCOPY t_request,
p_name IN VARCHAR2,
p_type IN VARCHAR2,
p_value IN VARCHAR2);
FUNCTION invoke(p_request IN OUT NOCOPY t_request,
p_url IN VARCHAR2,
p_action IN VARCHAR2)
RETURN t_response;
FUNCTION get_return_value(p_response IN OUT NOCOPY t_response,
p_name IN VARCHAR2,
p_namespace IN VARCHAR2)
RETURN VARCHAR2;
END soap_api;
/
SHOW ERRORS
CREATE OR REPLACE PACKAGE BODY soap_api AS
-- --------------------------------------------------------------------------
-- Name : http://www.oracle-base.com/dba/miscellaneous/soap_api
-- Author : DR Timothy S Hall
-- Description : SOAP related functions for consuming web services.
-- Ammedments :
-- When Who What
-- =========== ======== =================================================
-- 04-OCT-2003 Tim Hall Initial Creation
-- 23-FEB-2006 Tim Hall Parameterized the "soap" envelope tags.
-- --------------------------------------------------------------------------
-- ---------------------------------------------------------------------
FUNCTION new_request(p_method IN VARCHAR2,
p_namespace IN VARCHAR2,
p_envelope_tag IN VARCHAR2 DEFAULT 'SOAP-ENV')
RETURN t_request AS
-- ---------------------------------------------------------------------
l_request t_request;
BEGIN
l_request.method := p_method;
l_request.namespace := p_namespace;
l_request.envelope_tag := p_envelope_tag;
RETURN l_request;
END;
-- ---------------------------------------------------------------------
-- ---------------------------------------------------------------------
PROCEDURE add_parameter(p_request IN OUT NOCOPY t_request,
p_name IN VARCHAR2,
p_type IN VARCHAR2,
p_value IN VARCHAR2) AS
-- ---------------------------------------------------------------------
BEGIN
p_request.body := p_request.body||'<'||p_name||' xsi:type="'||p_type||'">'||p_value||'</'||p_name||'>';
END;
-- ---------------------------------------------------------------------
-- ---------------------------------------------------------------------
PROCEDURE generate_envelope(p_request IN OUT NOCOPY t_request,
p_env IN OUT NOCOPY VARCHAR2) AS
-- ---------------------------------------------------------------------
BEGIN
p_env := '<'||p_request.envelope_tag||':Envelope xmlns:'||p_request.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/" ' ||
'xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance" xmlns:xsd="http://www.w3.org/1999/XMLSchema">' ||
'<'||p_request.envelope_tag||':Body>' ||
'<'||p_request.method||' '||p_request.namespace||' '||p_request.envelope_tag||':encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">' ||
p_request.body ||
'</'||p_request.method||'>' ||
'</'||p_request.envelope_tag||':Body>' ||
'</'||p_request.envelope_tag||':Envelope>';
END;
-- ---------------------------------------------------------------------
-- ---------------------------------------------------------------------
PROCEDURE show_envelope(p_env IN VARCHAR2) AS
-- ---------------------------------------------------------------------
i PLS_INTEGER;
l_len PLS_INTEGER;
BEGIN
i := 1; l_len := LENGTH(p_env);
WHILE (i <= l_len) LOOP
DBMS_OUTPUT.put_line(SUBSTR(p_env, i, 60));
i := i + 60;
END LOOP;
END;
-- ---------------------------------------------------------------------
-- ---------------------------------------------------------------------
PROCEDURE check_fault(p_response IN OUT NOCOPY t_response) AS
-- ---------------------------------------------------------------------
l_fault_node XMLTYPE;
l_fault_code VARCHAR2(256);
l_fault_string VARCHAR2(32767);
BEGIN
l_fault_node := p_response.doc.extract('/'||p_response.envelope_tag||':Fault',
'xmlns:'||p_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/');
IF (l_fault_node IS NOT NULL) THEN
l_fault_code := l_fault_node.extract('/'||p_response.envelope_tag||':Fault/faultcode/child::text()',
'xmlns:'||p_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/').getstringval();
l_fault_string := l_fault_node.extract('/'||p_response.envelope_tag||':Fault/faultstring/child::text()',
'xmlns:'||p_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/').getstringval();
RAISE_APPLICATION_ERROR(-20000, l_fault_code || ' - ' || l_fault_string);
END IF;
END;
-- ---------------------------------------------------------------------
-- ---------------------------------------------------------------------
FUNCTION invoke(p_request IN OUT NOCOPY t_request,
p_url IN VARCHAR2,
p_action IN VARCHAR2)
RETURN t_response AS
-- ---------------------------------------------------------------------
l_envelope VARCHAR2(32767);
l_http_request UTL_HTTP.req;
l_http_response UTL_HTTP.resp;
l_response t_response;
BEGIN
generate_envelope(p_request, l_envelope);
show_envelope(l_envelope);
l_http_request := UTL_HTTP.begin_request(p_url, 'POST','HTTP/1.1');
UTL_HTTP.set_header(l_http_request, 'Content-Type', 'text/xml');
UTL_HTTP.set_header(l_http_request, 'Content-Length', LENGTH(l_envelope));
UTL_HTTP.set_header(l_http_request, 'SOAPAction', p_action);
UTL_HTTP.write_text(l_http_request, l_envelope);
l_http_response := UTL_HTTP.get_response(l_http_request);
UTL_HTTP.read_text(l_http_response, l_envelope);
UTL_HTTP.end_response(l_http_response);
l_response.doc := XMLTYPE.createxml(l_envelope);
l_response.envelope_tag := p_request.envelope_tag;
l_response.doc := l_response.doc.extract('/'||l_response.envelope_tag||':Envelope/'||l_response.envelope_tag||':Body/child::node()',
'xmlns:'||l_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/"');
-- show_envelope(l_response.doc.getstringval());
check_fault(l_response);
RETURN l_response;
END;
-- ---------------------------------------------------------------------
-- ---------------------------------------------------------------------
FUNCTION get_return_value(p_response IN OUT NOCOPY t_response,
p_name IN VARCHAR2,
p_namespace IN VARCHAR2)
RETURN VARCHAR2 AS
-- ---------------------------------------------------------------------
BEGIN
RETURN p_response.doc.extract('//'||p_name||'/child::text()',p_namespace).getstringval();
END;
-- ---------------------------------------------------------------------
END soap_api;
/
SHOW ERRORS
2。创建 web service 接口调用方法 , (function,tigger,procedures都可以)
CREATE OR REPLACE FUNCTION add_numbers (p_int_1 IN NUMBER,
p_int_2 IN NUMBER)
RETURN NUMBER
AS
l_request soap_api.t_request;
l_response soap_api.t_response;
l_return VARCHAR2(32767);
l_url VARCHAR2(32767);
l_namespace VARCHAR2(32767);
l_method VARCHAR2(32767);
l_soap_action VARCHAR2(32767);
l_result_name VARCHAR2(32767);
BEGIN
l_url := 'http://www.oracle-base.com/webservices/server.php';
l_namespace := 'xmlns="http://www.oracle-base.com/webservices/"';
l_method := 'ws_add';
l_soap_action := 'http://www.oracle-base.com/webservices/server.php/ws_add';
l_result_name := 'return';
l_request := soap_api.new_request(p_method => l_method,
p_namespace => l_namespace);
soap_api.add_parameter(p_request => l_request,
p_name => 'int1',
p_type => 'xsd:integer',
p_value => p_int_1);
soap_api.add_parameter(p_request => l_request,
p_name => 'int2',
p_type => 'xsd:integer',
p_value => p_int_2);
l_response := soap_api.invoke(p_request => l_request,
p_url => l_url,
p_action => l_soap_action);
l_return := soap_api.get_return_value(p_response => l_response,
p_name => l_result_name,
p_namespace => NULL);
RETURN l_return;
END;
/
3。测试
SELECT add_numbers(1, 5) FROM dual;
ADD_NUMBERS(1,5)
----------------
6
SQL>
SELECT add_numbers(10, 15) FROM dual;
ADD_NUMBERS(10,15)
------------------
25
SQL>
原文:http://www.oracle-base.com/articles/9i/ConsumingWebServices9i.php