Added WebAPI class

CMakeLists.txt

@@ -7,7 +7,7 @@ set(CMAKE_CXX_STANDARD 14)
 
 add_subdirectory(external/curl)
 add_subdirectory(external/jsoncpp)
-add_executable(TradeSim main.cpp src/Market.cpp src/Market.h src/Exchange.cpp src/Exchange.h src/Trader.h src/TradeTracker.cpp src/TradeTracker.h src/Binance.cpp src/Binance.h src/Wallet.cpp src/Wallet.h src/Transaction.cpp src/Transaction.h)
+add_executable(TradeSim main.cpp src/Market.cpp src/Market.h src/Exchange.cpp src/Exchange.h src/Trader.h src/TradeTracker.cpp src/TradeTracker.h src/Binance.cpp src/Binance.h src/Wallet.cpp src/Wallet.h src/Transaction.cpp src/Transaction.h src/WebAPI.cpp src/WebAPI.h)
 target_link_libraries(TradeSim libcurl)
 target_link_libraries(TradeSim jsoncpp_lib)
 include_directories(${CURL_INCLUDE_DIR})

docs/dev.org

@@ -87,6 +87,14 @@ class Transaction{
   -double amount
   -double price
 }
+
+WebAPI <... Binance
+
+class WebAPI{
+ -String baseURL
+ +WebAPI(baseURL: String)
+ +request(path: String): JsonValue
+}
 @enduml
 #+END_SRC
 

src/WebAPI.cpp

@@ -0,0 +1,47 @@
+#include "WebAPI.h"
+
+
+
+WebAPI::WebAPI(const std::string &baseUrl) : baseURL(baseUrl) {}
+
+Json::Value WebAPI::request(const std::string &path) {
+    CURL *curl;
+    CURLcode res;
+
+    curl = curl_easy_init();
+    if(curl) {
+        std::string s;
+        std::string URL = baseURL+path;
+        curl_easy_setopt(curl, CURLOPT_URL, URL.c_str());
+
+
+        curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
+
+        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
+        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
+
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writefunc);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &s);
+
+        res = curl_easy_perform(curl);
+
+        if(res != CURLE_OK)
+            fprintf(stderr, "curl_easy_perform() failed: %s\n",
+                    curl_easy_strerror(res));
+        Json::Value root;
+        JSONCPP_STRING err;
+        Json::CharReaderBuilder builder;
+        const std::unique_ptr<Json::CharReader> reader(builder.newCharReader());
+        if (!reader->parse(s.c_str(), s.c_str() + s.length(), &root,
+                           &err)) {
+            throw "Ivalid JSON!";
+        }
+        curl_easy_cleanup(curl);
+    }
+    return Json::Value();
+}
+size_t writefunc(void *ptr, size_t size, size_t nmemb, std::string *s)
+{
+    s->append(static_cast<char *>(ptr), size*nmemb);
+    return size*nmemb;
+}

src/WebAPI.h

@@ -0,0 +1,18 @@
+#ifndef TRADESIM_WEBAPI_H
+#define TRADESIM_WEBAPI_H
+#include <string>
+#include <curl/curl.h>
+#include <json/json.h>
+
+class WebAPI {
+    std::string baseURL;
+public:
+    WebAPI(const std::string &baseUrl);
+    Json::Value request(const std::string& path);
+
+};
+
+static size_t writefunc(void *ptr, size_t size, size_t nmemb, std::string *s);
+
+
+#endif //TRADESIM_WEBAPI_H