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esp32_https_server/src/ResourceResolver.cpp at master · Sejny/esp32_https_server · GitHub
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ResourceResolver.cpp
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ResourceResolver.cpp
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#
include
"
ResourceResolver.hpp
"
namespace
httpsserver
{
ResourceResolver::ResourceResolver
() {
_nodes =
new
std::vector<HTTPNode *>();
_defaultNode =
NULL
;
}
ResourceResolver::~ResourceResolver
() {
delete
_nodes;
}
/*
*
* This method will register the HTTPSNode so it is reachable and its callback gets called for a request
*/
void
ResourceResolver::registerNode
(HTTPNode *node) {
_nodes->
push_back
(node);
}
/*
*
* This method can be used to deactivate a HTTPSNode that has been registered previously
*/
void
ResourceResolver::unregisterNode
(HTTPNode *node) {
}
void
ResourceResolver::resolveNode
(
const
std::string &method,
const
std::string &url, ResolvedResource &resolvedResource, HTTPNodeType nodeType) {
//
Reset the resource
resolvedResource.
setMatchingNode
(
NULL
);
resolvedResource.
setParams
(
NULL
);
//
Memory management of this object will be performed by the ResolvedResource instance
ResourceParameters * params =
new
ResourceParameters
();
//
Split URL in resource name and request params. Request params start after an optional '?'
size_t
reqparamIdx = url.
find
(
'
?
'
);
//
Store this index to stop path parsing there
size_t
pathEnd = reqparamIdx != std::string::npos ? reqparamIdx : url.
size
();
//
If no '?' is contained in url, 0:npos will return the string as it is
std::string resourceName = url.
substr
(
0
, reqparamIdx);
//
Set request params in params object if a '?' exists
if
(reqparamIdx != std::string::npos) {
do
{
//
Drop the '?' or '&'
reqparamIdx +=
1
;
//
Parameters are separated by '&'
size_t
nextparamIdx = url.
find
(
'
&
'
, reqparamIdx);
//
Get the "name=value" string
std::string param = nextparamIdx == std::string::npos ?
url.
substr
(reqparamIdx) :
url.
substr
(reqparamIdx, nextparamIdx - reqparamIdx);
if
(param.
length
() >
0
) {
//
Find the position where the string has to be split
size_t
nvSplitIdx = param.
find
(
'
=
'
);
//
Use empty string if only name is set. /foo?bar&baz=1 will return "" for bar
std::string name =
urlDecode
(param.
substr
(
0
, nvSplitIdx));
std::string value =
"
"
;
if
(nvSplitIdx != std::string::npos) {
value =
urlDecode
(param.
substr
(nvSplitIdx+
1
));
}
//
Now we finally have name and value.
params->
setQueryParameter
(name, value);
}
//
Update reqparamIdx
reqparamIdx = nextparamIdx;
}
while
(reqparamIdx != std::string::npos);
}
//
Check whether a resource matches
for
(std::vector<HTTPNode*>::iterator itNode = _nodes->
begin
(); itNode != _nodes->
end
(); ++itNode) {
params->
resetPathParameters
();
HTTPNode *node = *itNode;
if
(node->
_nodeType
==nodeType) {
if
(
//
For handler functions, check the method declared with the node
(node->
_nodeType
==
HANDLER_CALLBACK
&& ((ResourceNode*)node)->
_method
== method) ||
//
For websockets, the specification says that GET is the only choice
(node->
_nodeType
==
WEBSOCKET
&& method==
"
GET
"
)
) {
HTTPS_LOGD
(
"
Testing route %s
"
, node->
_path
.
c_str
());
bool
match =
true
;
size_t
paramCount = node->
getPathParamCount
();
//
indices in input and pattern
size_t
inputIdx =
0
, pathIdx =
0
;
HTTPS_LOGD
(
"
(INIT) inputIdx: %d, pathIdx: %d, pathEnd: %d, path: %s, url: %s
"
,
inputIdx, pathIdx, pathEnd, node->
_path
.
c_str
(), url.
c_str
());
for
(
size_t
paramIdx =
0
; match && paramIdx < paramCount; paramIdx +=
1
) {
HTTPS_LOGD
(
"
(LOOP) inputIdx: %d, pathIdx: %d, pathEnd: %d, path: %s, url: %s
"
,
inputIdx, pathIdx, pathEnd, node->
_path
.
c_str
(), url.
c_str
());
//
Test static path before the parameter
size_t
paramPos = node->
getParamIdx
(paramIdx);
size_t
staticLength = paramPos - pathIdx;
match &= url.
substr
(inputIdx, staticLength) == node->
_path
.
substr
(pathIdx, staticLength);
inputIdx += staticLength;
pathIdx += staticLength;
//
Extract parameter value
if
(match) {
size_t
paramEnd = url.
find
(
'
/
'
, inputIdx);
if
(paramEnd == std::string::npos && inputIdx <= pathEnd) {
//
Consume the remaining input (might be "" for the last param)
paramEnd = pathEnd;
}
if
(paramEnd != std::string::npos) {
size_t
paramLength = paramEnd - inputIdx;
params->
setPathParameter
(paramIdx,
urlDecode
(url.
substr
(inputIdx, paramLength)));
pathIdx +=
1
;
inputIdx += paramLength;
}
else
{
match =
false
;
HTTPS_LOGD
(
"
(LOOP) No match on param part
"
);
}
}
else
{
HTTPS_LOGD
(
"
(LOOP) No match on static part
"
);
}
}
HTTPS_LOGD
(
"
(STTC) inputIdx: %d, pathIdx: %d, pathEnd: %d, path: %s, url: %s
"
,
inputIdx, pathIdx, pathEnd, node->
_path
.
c_str
(), url.
c_str
());
//
Test static path after the parameter (up to pathEnd)
if
(match) {
match = url.
substr
(inputIdx, pathEnd - inputIdx)==node->
_path
.
substr
(pathIdx);
}
HTTPS_LOGD
(
"
(END ) inputIdx: %d, pathIdx: %d, pathEnd: %d, path: %s, url: %s
"
,
inputIdx, pathIdx, pathEnd, node->
_path
.
c_str
(), url.
c_str
());
if
(match) {
resolvedResource.
setMatchingNode
(node);
HTTPS_LOGD
(
"
It's a match!
"
);
break
;
}
}
//
method check
}
//
node type check
}
//
resource node for loop
//
If the resource did not match, configure the default resource
if
(!resolvedResource.
didMatch
() && _defaultNode !=
NULL
) {
params->
resetPathParameters
();
resolvedResource.
setMatchingNode
(_defaultNode);
}
//
If resolving did work, set the params, otherwise delete them
if
(resolvedResource.
didMatch
()) {
//
The resolvedResource now takes care of memory management for the params
resolvedResource.
setParams
(params);
}
else
{
delete
params;
}
}
void
ResourceResolver::addMiddleware
(
const
HTTPSMiddlewareFunction * mwFunction) {
_middleware.
push_back
(mwFunction);
}
void
ResourceResolver::removeMiddleware
(
const
HTTPSMiddlewareFunction * mwFunction) {
_middleware.
erase
(
std::remove
(_middleware.
begin
(), _middleware.
end
(), mwFunction), _middleware.
end
());
}
const
std::vector<HTTPSMiddlewareFunction*>
ResourceResolver::getMiddleware
() {
return
_middleware;
}
void
ResourceResolver::setDefaultNode
(HTTPNode * defaultNode) {
_defaultNode = defaultNode;
}
}
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