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Add GetQueryParameter helper function

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Easily get the query parameter from the URI, with optional default value.
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stickies-v 2022-01-05 14:28:12 +00:00
parent fff771ee86
commit a09497614e
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4 changed files with 101 additions and 3 deletions
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28
src/httpserver.h
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@ -5,8 +5,9 @@
#ifndef BITCOIN_HTTPSERVER_H
#define BITCOIN_HTTPSERVER_H
#include <string>
#include <functional>
#include <optional>
#include <string>
static const int DEFAULT_HTTP_THREADS=4;
static const int DEFAULT_HTTP_WORKQUEUE=16;
@ -83,6 +84,17 @@ public:
*/
RequestMethod GetRequestMethod() const;
/** Get the query parameter value from request uri for a specified key, or std::nullopt if the
* key is not found.
*
* If the query string contains duplicate keys, the first value is returned. Many web frameworks
* would instead parse this as an array of values, but this is not (yet) implemented as it is
* currently not needed in any of the endpoints.
*
* @param[in] key represents the query parameter of which the value is returned
*/
std::optional<std::string> GetQueryParameter(const std::string& key) const;
/**
* Get the request header specified by hdr, or an empty string.
* Return a pair (isPresent,string).
@ -115,6 +127,20 @@ public:
void WriteReply(int nStatus, const std::string& strReply = "");
};
/** Get the query parameter value from request uri for a specified key, or std::nullopt if the key
* is not found.
*
* If the query string contains duplicate keys, the first value is returned. Many web frameworks
* would instead parse this as an array of values, but this is not (yet) implemented as it is
* currently not needed in any of the endpoints.
*
* Helper function for HTTPRequest::GetQueryParameter.
*
* @param[in] uri is the entire request uri
* @param[in] key represents the query parameter of which the value is returned
*/
std::optional<std::string> GetQueryParameterFromUri(const char* uri, const std::string& key);
/** Event handler closure.
*/
class HTTPClosure