C++ gSOAP指定访问控制允许源_C++_Json_Web Services_Jsonp_Gsoap

C++ gSOAP指定访问控制允许源

c++ json web-services

C++ gSOAP指定访问控制允许源,c++,json,web-services,jsonp,gsoap,C++,Json,Web Services,Jsonp,Gsoap,我用gSOAP开发了开发者Web服务。其中一个方法返回json输出。但是，浏览器需要传递标头（访问控制允许源）。gSOAP是否支持在发送数据之前传递头 UPD: 找到解决方案。只需向http_响应函数添加一些代码： static int http_response(struct soap *soap, int status, size_t count) { /* some code goes here*/ if ((err = soap->fposthdr(soap, "Access-C

我用gSOAP开发了开发者Web服务。其中一个方法返回json输出。但是，浏览器需要传递标头（访问控制允许源）。gSOAP是否支持在发送数据之前传递头

UPD:

找到解决方案。只需向http_响应函数添加一些代码：

static int
http_response(struct soap *soap, int status, size_t count)
{
 /* some code goes here*/
if ((err = soap->fposthdr(soap, "Access-Control-Allow-Origin", "*")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, CONNECT")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Headers", "X-Requested-With, Content-Type")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Credentials", "true")))
      return err;
 /* some code goes here*/
}

/******************************************************************************/
#ifndef WITH_NOHTTP
#ifndef PALM_1
static int
http_post(struct soap *soap, const char *endpoint, const char *host, int port, const char *path, const char *action, size_t count)
{ register const char *s;
  register int err;
  ... the code of the function (except the return at the end) ...

  /* add more headers */
  if ((err = soap->fposthdr(soap, "ClientCertSubjectDN", "CN=IVR Production")))
    return err;

  return soap->fposthdr(soap, NULL, NULL);
}
#endif
#endif

我从来没有在我自己的代码中找到任何方法来实现这一点，但我可以通过修改stdsoap2.cpp来实现这一点，这似乎还可以，因为您无论如何都需要将其编译到代码中。我所做的是在http_post函数结束之前添加ClientCertSubjectDN头：

static int
http_response(struct soap *soap, int status, size_t count)
{
 /* some code goes here*/
if ((err = soap->fposthdr(soap, "Access-Control-Allow-Origin", "*")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, CONNECT")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Headers", "X-Requested-With, Content-Type")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Credentials", "true")))
      return err;
 /* some code goes here*/
}

/******************************************************************************/
#ifndef WITH_NOHTTP
#ifndef PALM_1
static int
http_post(struct soap *soap, const char *endpoint, const char *host, int port, const char *path, const char *action, size_t count)
{ register const char *s;
  register int err;
  ... the code of the function (except the return at the end) ...

  /* add more headers */
  if ((err = soap->fposthdr(soap, "ClientCertSubjectDN", "CN=IVR Production")))
    return err;

  return soap->fposthdr(soap, NULL, NULL);
}
#endif
#endif

static int
http_response(struct soap *soap, int status, size_t count)
{
 /* some code goes here*/
if ((err = soap->fposthdr(soap, "Access-Control-Allow-Origin", "*")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, CONNECT")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Headers", "X-Requested-With, Content-Type")))
      return err;
  if ((err = soap->fposthdr(soap, "Access-Control-Allow-Credentials", "true")))
      return err;
 /* some code goes here*/
}

/******************************************************************************/
#ifndef WITH_NOHTTP
#ifndef PALM_1
static int
http_post(struct soap *soap, const char *endpoint, const char *host, int port, const char *path, const char *action, size_t count)
{ register const char *s;
  register int err;
  ... the code of the function (except the return at the end) ...

  /* add more headers */
  if ((err = soap->fposthdr(soap, "ClientCertSubjectDN", "CN=IVR Production")))
    return err;

  return soap->fposthdr(soap, NULL, NULL);
}
#endif
#endif

实际上，在不更改gsoap代码的情况下，将自己的HTTP头添加到服务器响应中是一种非常麻烦的方法

定义一个变量来存储原始回调钩子fposthdr的地址

定义自己的fposthdr实现

在上述变量中存储函数fposthdr的地址

设置您自己的fposthdr实现

在您自己的fposthdr实现中，使用fposthdr的原始实现来发出HTTP头

代码示例：

...
/* Declaration of own implementation of fposthdr */
int my_fposthdr(struct soap *soap, const char *key, const char *val);
/* Definition of variable to store address of original fposthdr */
int (*org_fposthdr) (struct soap *soap, const char *key, const char *val) = NULL;
...
struct soap *soap
...
/* Store address of original function and set own implementation */
org_fposthdr = soap->fposthdr;
soap->fposthdr = my_fposthdr;
...
int my_fposthdr(struct soap *soap, const char *key, const char *val) {
    int res;
    if (key == NULL) {
        res = org_fposthdr (soap, "Access-Control-Allow-Origin", "*");
        ...
    }
    /* Make sure to finally call original fposthdr with key and value being NULL pointers. */
    return org_fposthdr (soap, key, val);
}
...

备注：

上面my_fposthdr的示例实现在gsoap发出的所有“默认”HTTP头之后发出额外的HTTP头。gsoap对每个头调用一次回调钩子，并在末尾再次调用，其中key和val是空指针。因此，您可以让您的代码检测这些空指针并发出您自己的头。最后，您必须使用key和val作为空指针调用原始的fposthdr，否则将不会发送HTTP有效负载，即SOAP响应。

实际上有一种很麻烦的方法，可以在不更改gsoap代码的情况下将您自己的HTTP头添加到服务器响应中