diff options
| -rw-r--r-- | api.c | 123 | ||||
| -rw-r--r-- | api.h | 35 |
2 files changed, 93 insertions, 65 deletions
@@ -3,10 +3,8 @@ Info* api_info_init(void) { Info* pInfo = malloc(sizeof(Info)); pointer_alloc_check(pInfo); - pInfo->name = malloc(64); - pointer_alloc_check(pInfo->name); - pInfo->symbol = malloc(64); - pointer_alloc_check(pInfo->symbol); + pInfo->name[0] = '\0'; + pInfo->symbol[0] = '\0'; pInfo->price = EMPTY; pInfo->change_1d = EMPTY; pInfo->change_7d = EMPTY; @@ -17,8 +15,7 @@ Info* api_info_init(void) { return pInfo; } -size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* hString) { - String* pString = hString; +size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* pString) { size_t new_len = pString->len + size * nmemb; pString->data = realloc(pString->data, new_len + 1); pointer_alloc_check(pString->data); @@ -29,13 +26,12 @@ size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* hStrin } String* api_curl_data(const char* url, const char* post_field) { - String* pString = string_init(); CURL* curl = curl_easy_init(); CURLcode res; - if (!curl) { // Error creating curl object - string_destroy(&pString); + if (!curl) // Error creating curl object RETNULL_MSG("Error initializing curl.") - } + + String* pString = string_init(); curl_easy_setopt(curl, CURLOPT_URL, url); // Set URL curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L); // Needed for HTTPS curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, api_string_writefunc); // Specify writefunc for return data @@ -52,38 +48,47 @@ String* api_curl_data(const char* url, const char* post_field) { curl_slist_free_all(list); curl_easy_cleanup(curl); if (res != CURLE_OK) { - string_destroy(&pString);// Free and return NULL + string_destroy(&pString); // Error receiving data RETNULL_MSG("Error curling data.") } + return pString; } -double* api_get_current_price(const char* ticker_name_string) { +double* api_get_current_price(const char* symbol) { double* val; - if (strlen(ticker_name_string) > 5) { // If symbol length is greater than 5, then it must be a crypto - val = coinmarketcap_get_price(ticker_name_string); + if (strlen(symbol) > 5) { // If symbol length is greater than 5, then it must be a crypto + val = coinmarketcap_get_price(symbol); return val; } - val = iex_get_price(ticker_name_string); // First tries IEX for intraday prices + + val = iex_get_price(symbol); // First tries IEX for intraday prices if (val != NULL) return val; - val = morningstar_get_price(ticker_name_string); // Secondly tries Morningstar for market open/close data + + val = morningstar_get_price(symbol); // Secondly tries Morningstar for market open/close data if (val != NULL) return val; - val = coinmarketcap_get_price(ticker_name_string); // Thirdly tries Coinmarketcap for real-time crypto data + + val = coinmarketcap_get_price(symbol); // Thirdly tries Coinmarketcap for real-time crypto data if (val != NULL) return val; + return NULL; // Invalid symbol } -double* iex_get_price(const char* ticker_name_string) { +double* iex_get_price(const char* symbol) { char iex_api_string[80]; - sprintf(iex_api_string, "https://api.iextrading.com/1.0/stock/%s/quote", ticker_name_string); + sprintf(iex_api_string, "https://api.iextrading.com/1.0/stock/%s/quote", symbol); String* pString = api_curl_data(iex_api_string, NULL); + if (pString == NULL) + return NULL; + if (strcmp(pString->data, "Unknown symbol") == 0) { // Invalid symbol string_destroy(&pString); return NULL; } + Json* jobj = json_tokener_parse(pString->data); double* api_data = malloc(sizeof(double) * 3); pointer_alloc_check(api_data); @@ -92,9 +97,21 @@ double* iex_get_price(const char* ticker_name_string) { api_data[1] = json_object_get_double(json_object_object_get(jobj, "previousClose")); // Previous close json_object_put(jobj); string_destroy(&pString); + // Second API call gives 7D price - sprintf(iex_api_string, "https://api.iextrading.com/1.0/stock/%s/chart", ticker_name_string); + sprintf(iex_api_string, "https://api.iextrading.com/1.0/stock/%s/chart", symbol); pString = api_curl_data(iex_api_string, NULL); + if (pString == NULL) { + free(api_data); + return NULL; + } + + if (strcmp(pString->data, "Unknown symbol") == 0) { // May happen as a result of an unpredictable API + free(api_data); + string_destroy(&pString); + return NULL; + } + jobj = json_tokener_parse(pString->data); api_data[2] = json_object_get_double( json_object_object_get(json_object_array_get_idx(jobj, json_object_array_length(jobj) - 5), "close")); @@ -103,23 +120,27 @@ double* iex_get_price(const char* ticker_name_string) { return api_data; } -double* morningstar_get_price(const char* ticker_name_string) { - char today_char[16], yesterday_char[16], morningstar_api_string[256]; +double* morningstar_get_price(const char* symbol) { + char today_str[16], yesterday_str[16], morningstar_api_string[256]; time_t now = time(NULL); struct tm* ts = localtime(&now); - strftime(today_char, 16, "%Y-%m-%d", ts); + strftime(today_str, 16, "%Y-%m-%d", ts); ts->tm_mday -= 12; // Get info from past 12 days mktime(ts); - strftime(yesterday_char, 16, "%Y-%m-%d", ts); + strftime(yesterday_str, 16, "%Y-%m-%d", ts); sprintf(morningstar_api_string, "http://globalquote.morningstar.com/globalcomponent/RealtimeHistoricalStockData.ashx?showVol=true&dtype=his" "&f=d&curry=USD&isD=true&isS=true&hasF=true&ProdCode=DIRECT&ticker=%s&range=%s|%s", - ticker_name_string, yesterday_char, today_char); + symbol, yesterday_str, today_str); String* pString = api_curl_data(morningstar_api_string, NULL); + if (pString == NULL) + return NULL; + if (strcmp("null", pString->data) == 0) { // Invalid symbol string_destroy(&pString); return NULL; } + Json* jobj = json_tokener_parse(pString->data); double* api_data = malloc(sizeof(double) * 3); pointer_alloc_check(api_data); @@ -134,14 +155,18 @@ double* morningstar_get_price(const char* ticker_name_string) { return api_data; } -double* coinmarketcap_get_price(const char* ticker_name_string) { +double* coinmarketcap_get_price(const char* symbol) { char coinmarketcap_api_string[64]; - sprintf(coinmarketcap_api_string, "https://api.coinmarketcap.com/v1/ticker/%s", ticker_name_string); + sprintf(coinmarketcap_api_string, "https://api.coinmarketcap.com/v1/ticker/%s", symbol); String* pString = api_curl_data(coinmarketcap_api_string, NULL); + if (pString == NULL) + return NULL; + if (pString->data[0] == '{') { // Invalid symbol string_destroy(&pString); return NULL; } + Json* jobj = json_tokener_parse(pString->data); double* api_data = malloc(sizeof(double) * 3); pointer_alloc_check(api_data); @@ -156,26 +181,27 @@ double* coinmarketcap_get_price(const char* ticker_name_string) { return api_data; } -double* api_get_hist_5y(const char* ticker_name_string) { - if (strlen(ticker_name_string) > 5) // Cryptocurrency +double* api_get_hist_5y(const char* symbol) { + if (strlen(symbol) > 5) // Cryptocurrency return NULL; - double* val = iex_get_hist_5y(ticker_name_string); // First tries IEX - if (val != NULL) - return val; - val = morningstar_get_hist_5y(ticker_name_string); // Secondly tries Morningstar + double* val = iex_get_hist_5y(symbol); // First tries IEX if (val != NULL) return val; - return NULL; // Invalid symbol or cryptocurrency + return morningstar_get_hist_5y(symbol); // Secondly tries Morningstar } -double* iex_get_hist_5y(const char* ticker_name_string) { +double* iex_get_hist_5y(const char* symbol) { char iex_api_string[64]; - sprintf(iex_api_string, "https://api.iextrading.com/1.0/stock/%s/chart/5y", ticker_name_string); + sprintf(iex_api_string, "https://api.iextrading.com/1.0/stock/%s/chart/5y", symbol); String* pString = api_curl_data(iex_api_string, NULL); + if (pString == NULL) + return NULL; + if (strcmp(pString->data, "Unknown symbol") == 0) { // Invalid symbol string_destroy(&pString); return NULL; } + Json* jobj = json_tokener_parse(pString->data); size_t len = json_object_array_length(jobj); double* api_data = calloc(len + 1, sizeof(double)); @@ -187,36 +213,40 @@ double* iex_get_hist_5y(const char* ticker_name_string) { return api_data; } -double* morningstar_get_hist_5y(const char* ticker_name_string) { - char today_char[16], yesterday_char[16], morningstar_api_string[256]; +double* morningstar_get_hist_5y(const char* symbol) { + char today_str[16], yesterday_str[16], morningstar_api_string[256]; time_t now = time(NULL); struct tm* ts = localtime(&now); mktime(ts); - strftime(today_char, 16, "%Y-%m-%d", ts); + strftime(today_str, 16, "%Y-%m-%d", ts); ts->tm_year -= 5; //get info from past 5 years mktime(ts); - strftime(yesterday_char, 16, "%Y-%m-%d", ts); + strftime(yesterday_str, 16, "%Y-%m-%d", ts); sprintf(morningstar_api_string, "http://globalquote.morningstar.com/globalcomponent/RealtimeHistoricalStockData.ashx?showVol=true&dtype=his" "&f=d&curry=USD&isD=true&isS=true&hasF=true&ProdCode=DIRECT&ticker=%s&range=%s|%s", - ticker_name_string, yesterday_char, today_char); + symbol, yesterday_str, today_str); String* pString = api_curl_data(morningstar_api_string, NULL); + if (pString == NULL) + return NULL; + if (strcmp("null", pString->data) == 0) { // Invalid symbol string_destroy(&pString); return NULL; } + Json* jobj = json_tokener_parse(pString->data); Json* datapoints = json_object_object_get( json_object_array_get_idx(json_object_object_get(jobj, "PriceDataList"), 0), "Datapoints"); size_t len = json_object_array_length(datapoints); - double* ret = calloc(len + 1, sizeof(double)); // Must calloc() because some data points don't exist - pointer_alloc_check(ret); + double* api_data = calloc(len + 1, sizeof(double)); // Must calloc() because some data points don't exist + pointer_alloc_check(api_data); for (int i = 0; i < (int) len; i++) - ret[i] = json_object_get_double( + api_data[i] = json_object_get_double( json_object_array_get_idx(json_object_array_get_idx(datapoints, (size_t) i), 0)); json_object_put(jobj); string_destroy(&pString); - return ret; + return api_data; } void news_print_top_three(const char* ticker_name_string) { @@ -441,9 +471,6 @@ char* google_shorten_link(const char* url_string) { } void api_info_destroy(Info** phInfo) { - Info* pInfo = *phInfo; - free(pInfo->name); - free(pInfo->symbol); free(*phInfo); *phInfo = NULL; }
\ No newline at end of file @@ -9,6 +9,7 @@ #ifndef API_H #define API_H +#define SYMBOL_MAX_LENGTH 32 #define EMPTY (-999) #include <stddef.h> @@ -17,8 +18,8 @@ #include "string-tick.h" typedef struct info { - char* name; // Name of security (ex. Apple Inc.) - char* symbol; // Symbol of security (ex. AAPL) + char name[SYMBOL_MAX_LENGTH]; // Name of security (ex. Apple Inc.) + char symbol[SYMBOL_MAX_LENGTH]; // Symbol of security (ex. AAPL) double price; // Current price of security in USD (ex. 174.54) double change_1d, change_7d, change_30d; // Percent change in the past x days (ex. -7.49) double div_yield; // Percent dividend yield (ex. 1.46) @@ -36,7 +37,7 @@ Info* api_info_init(void); * writefunction for cURL HTTP GET/POST * stolen from a nice man on stackoverflow */ -size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* hString); +size_t api_string_writefunc(void* ptr, size_t size, size_t nmemb, String* pString); /** * If post_field is not NULL, performs a HTTP POST with the given parameters. Otherwise, performs a HTTP GET. Response @@ -57,55 +58,55 @@ String* api_curl_data(const char* url, const char* post_field); * 1. IEX -- NASDAQ/NYSE/NYSEARCA * 2. Morningstar -- MUTF/OTCMKTS * 3. Coinmarketcap -- CRYPTO - * @param ticker_name_string security symbol or name to get prices of + * @param symbol security symbol or name to get prices of * @return price data or NULL if invalid symbol */ -double* api_get_current_price(const char* ticker_name_string); +double* api_get_current_price(const char* symbol); /** * Returns current and yesterday's price of a stock with data from IEX. * Tested for NASDAQ, NYSE, and NYSEARCA listed stocks/ETFs. - * @param ticker_name_string symbol + * @param symbol symbol * @return price data as defined by api_get_current_price or NULL if invalid symbol */ -double* iex_get_price(const char* ticker_name_string); +double* iex_get_price(const char* symbol); /** * Returns current and yesterday's price of a mutual fund with data from Morningstar * Tested for MUTF and OTCMKTS listed securities. - * @param ticker_name_string symbol + * @param symbol symbol * @return price data as defined by api_get_current_price or NULL if invalid symbol */ -double* morningstar_get_price(const char* ticker_name_string); +double* morningstar_get_price(const char* symbol); /** * Returns current and yesterday's price of a cryptocurrency with data from Coinmarketcap. * All cryptocurrencies listed on Coinmarketcap will work. - * @param ticker_name_string symbol + * @param symbol symbol * @return price data as defined by api_get_current_price or NULL if invalid symbol */ -double* coinmarketcap_get_price(const char* ticker_name_string); +double* coinmarketcap_get_price(const char* symbol); /** * Returns an array of doubles containing the close price each day in the past 5 years - * @param ticker_name_string symbol + * @param symbol symbol * @return double array of close prices */ -double* api_get_hist_5y(const char* ticker_name_string); +double* api_get_hist_5y(const char* symbol); /** * Returns an array of doubles containing the close price each day in the past 5 years - * @param ticker_name_string symbol of stock or etf + * @param symbol symbol of stock or etf * @return double array of close prices */ -double* iex_get_hist_5y(const char* ticker_name_string); +double* iex_get_hist_5y(const char* symbol); /** * Returns an array of doubles containing the close price each day in the past 5 years - * @param ticker_name_string symbol of mutf/otcmkts + * @param symbol symbol of mutf/otcmkts * @return double array of close prices */ -double* morningstar_get_hist_5y(const char* ticker_name_string); +double* morningstar_get_hist_5y(const char* symbol); /** * Prints the top three news articles by popularity pertaining to the given string, ticker_name_string. Spaces and |