這兩天,接到一個項目,需要在linux程式中調用遠端web應用,通過soap協議。開始上網查了下資料,發現了gsoap庫這個好東東^_^。繼續在網上搜尋例子代碼,發現基本都不可編譯通過,於是便一邊學習一邊寫了這個最簡單的例子,希望對後來者起到一點協助。
- 對gsoap的簡單介紹,請自己參閱http://gsoap2.sourceforge.net/
下載相應的包,主要有2個工具和原始碼:
wsdl2h -o outfile.h infile.wsdl 實現wsdl檔案到h檔案的資料對應
soapcpp2 -c outfile.h產生相應的底層通訊stub,strech程式
- 下面這個簡單的例子實現的是在用戶端輸入2個數字,然後遠程調用服務端的加法函數,最後返回結果給用戶端。
在這裡我們不需要wsdl的檔案,可以直接從.h檔案來產生代碼。我們定義一個函式宣告檔案,用來定義介面函數,名稱為add.h,內容如下:
- //gsoapopt cw
- //gsoap ns2 schema namespace: urn:add
- //gsoap ns2 schema form: unqualified
- //gsoap ns2 service name: add
- //gsoap ns2 service type: addPortType
- //gsoap ns2 service port:http://websrv.cs.fsu.edu/~engelen/addserver.cgi
- //gsoap ns2 service namespace: urn:add
- //gsoap ns2 service transport: http://schemas.xmlsoap.org/soap/http
- //gsoap ns2 service method-style: add rpc
- //gsoap ns2 service method-encoding:
- add http://schemas.xmlsoap.org/soap/encoding/
- //gsoap ns2 service method-action: add ""
- int ns2__add( int num1, int num2, int* sum );
然後我們執行soapcpp2 -c add.h,自動產生一些遠程調用需要的檔案。
接下來我們寫一個服務端,建立檔案addserver.c
- #include "soapH.h"
- #include "add.nsmap"
- int main(int argc, char **argv)
- {
- int m, s;
- struct soap add_soap;
- soap_init(&add_soap);
- soap_set_namespaces(&add_soap, namespaces);
- if (argc < 2) {
- printf("usage: %s <server_port> /n", argv[0]);
- exit(1);
- } else {
- m = soap_bind(&add_soap, NULL, atoi(argv[1]), 100);
- if (m < 0) {
- soap_print_fault(&add_soap, stderr);
- exit(-1);
- }
- fprintf(stderr, "Socket connection successful: master socket = %d/n", m);
- for (;;) {
- s = soap_accept(&add_soap);
- if (s < 0) {
- soap_print_fault(&add_soap, stderr);
- exit(-1);
- }
- fprintf(stderr, "Socket connection successful: slave socket = %d/n", s);
- soap_serve(&add_soap);
- soap_end(&add_soap);
- }
- }
- return 0;
- }
- int ns2__add(struct soap *add_soap, int num1, int num2, int *sum)
- {
- *sum = num1 + num2;
- return 0;
- }
我們接著寫用戶端,檔案addclient.c
- #include "soapStub.h"
- #include "add.nsmap"
- int add(const char *server, int num1, int num2, int *sum)
- {
- struct soap add_soap;
- int result = 0;
- soap_init(&add_soap);
- soap_set_namespaces(&add_soap, namespaces);
- soap_call_ns2__add(&add_soap, server, NULL, num1, num2, sum);
- printf("server is %s, num1 is %d, num2 is %d/n", server, num1, num2);
- if (add_soap.error) {
- printf("soap error: %d, %s, %s/n", add_soap.error, *soap_faultcode(&add_soap), *soap_faultstring(&add_soap));
- result = add_soap.error;
- }
- soap_end(&add_soap);
- soap_done(&add_soap);
- return result;
- }
最後寫一個測試代碼,addtest.c
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- int add(const char *server, int num1, int num2, int *sum);
- int main(int argc, char **argv)
- {
- int result = -1;
- char server[128] = {0};
- int num1;
- int num2;
- int sum;
- if (argc < 4) {
- printf("usage: %s <ip:port> num1 num2 /n", argv[0]);
- exit(1);
- }
- strcpy(server,argv[1]);
- num1 = atoi(argv[2]);
- num2 = atoi(argv[3]);
- result = add(server, num1, num2, ∑);
- if (result != 0) {
- printf("soap error, errcode=%d/n", result);
- } else {
- printf("%d + %d = %d/n", num1, num2, sum);
- }
- return 0;
- }
到此為止,我們自己的代碼已經編寫完畢,現在我們來編譯服務端和用戶端
注意:編譯的時候我們需要gsoap包裡的原始碼檔案,把stdsoap2.c和stdsoap2.h檔案拷貝到目前的目錄
我們寫一個Makefile檔案:
- GSOAP_ROOT = /root/gsoap-2.7/gsoap
- WSNAME = add
- CC = g++ -g -DWITH_NONAMESPACES
- INCLUDE = -I$(GSOAP_ROOT)
- SERVER_OBJS = soapC.o stdsoap2.o soapServer.o $(WSNAME)server.o
- CLIENT_OBJS = soapC.o stdsoap2.o soapClient.o $(WSNAME)client.o $(WSNAME)test.o
- all: server
- server: $(SERVER_OBJS)
- $(CC) $(INCLUDE) -o $(WSNAME)server $(SERVER_OBJS)
- client: $(CLIENT_OBJS)
- $(CC) $(INCLUDE) -o $(WSNAME)test $(CLIENT_OBJS)
- cl:
- rm -f *.o *.xml *.a *.wsdl *.nsmap soapH.h $(WSNAME)Stub.* $(WSNAME)server ns.xsd $(WSNAME)test
然後我們執行make,即可生產addserver程式;make client,產生addtest程式。
讓server跑起來,執行./addserver 6666
終端列印出“Socket connection successful: master socket = 3”,那麼你的server已經在前台run起來了;
運行用戶端,./addtest ip:port num1 num2,返回加法的結果。
OK,一個最簡單的soap調用的例子完成了,進深一步的學習請參考http://gsoap2.sourceforge.net/
from:http://blog.csdn.net/jinpw/article/details/3346844