利用PBFunc在Powerbuilder中支付宝当面付功能

在PB实现支付宝当面付的功能，需要先在支付宝进行商户签约，并设置相关的公钥信息（具体参考支付宝文档）。

然后使用对应的私钥文件对参数进RSAWithSha1前面计算。具体代码如下：

string ls_pubFileName,ls_priFileName
n_pbfunc_cryp lnv_cryp
ls_priFileName ="D:pbfunclib_pri.pem"//私钥文件
string ls_str

string ls_appId,ls_secret,ls_biz_content
ls_appId ="3434343"//改成你的appid
ls_biz_content='{"out_trade_no": "2015020011","scene": "bar_code","auth_code": "'+sle_1.Text+'","subject": "当面付条码支付","total_amount": "0.01"}'

ls_str ="app_id="+ls_appId
ls_str +='&biz_content='+ls_biz_content
ls_str +='&charset=utf-8'
ls_str +='&method=alipay.trade.pay'
ls_str +='&sign_type=RSA'
ls_str +='&timestamp=2016-05-08 11:27:15'
ls_str +='&version=1.0'
string ls_sigStr
blob utf8R
utf8R =lnv_cryp.of_str2utf8(ls_str)
if lnv_cryp.of_sha1withRsa(ls_priFileName,utf8R,lnv_cryp.HASH_RESULT_DEFAULT,ls_sigStr) then
	MessageBox("提示","签名成功："+ls_sigStr)
Else
	MessageBox("提示","签名失败")
end if

/*验证签名可以不需要调用*/
ls_pubFileName ="D:pbfunclib_pub.pem"//在D盘生成公钥文件pbfunclib_pub.pem
IF Not lnv_cryp.of_RSAVerifyFileSHA1(ls_pubFileName,utf8R,ls_sigStr,lnv_cryp.HASH_RESULT_DEFAULT) Then
	MessageBox("提示","验证签名失败")
else
	messagebox("","验证签名成功")
End IF
//ls_str +=''
n_pbfunc_http lnv_http
lnv_http.of_clear()//清空参数
string ls_data
ls_data  = "app_id="+wf_alipay_urlencode(ls_appId)
ls_data += "&biz_content="+wf_alipay_urlencode(ls_biz_content)
ls_data += "&charset="+wf_alipay_urlencode("utf-8")
ls_data += "&method="+wf_alipay_urlencode("alipay.trade.pay")
ls_data += "&sign_type="+wf_alipay_urlencode("RSA")
ls_data += "&sign="+wf_alipay_urlencode(ls_sigStr)
ls_data += "&timestamp="+wf_alipay_urlencode("2016-05-08 11:27:15")
ls_data += "&version="+wf_alipay_urlencode("1.0")
lnv_http.of_set_URL("https://openapi.alipay.com/gateway.do?"+ls_data)
Blob lblb_data
string ls_error
IF lnv_http.of_post(lblb_data,ls_error) Then
    string gbkData
    gbkData = lnv_cryp.of_utf8ToGbk(lblb_data)//由于返回来的是utf-8编码，直接显示会乱码
    MessageBox("提示",gbkData+" "+string(lblb_data))
Else
    MessageBox("提示","执行失败")
End IF

　　其中wf_alipay_urlencode函数代码如下：

//ls_str为参数

n_pbfunc_encode  lnv_encode
string ls_content,ls_reserved//指明不需要编码的字符
ls_reserved =""//都需要编码
string ls_sigStr
blob utf8R
utf8R =lnv_encode.of_str2utf8(ls_str)
lnv_encode.of_URIEncode2(utf8R,ls_content)
return ls_content

　　demo代码详见w_rsa窗体的SHA1WithRSA按钮下载地址：

http://download.csdn.net/detail/my_aa/9644084