![](/media/cache/group/ep_srxDLMd.webp.50x50_q85.jpg)
Beispiel Abfrage Yahoo Weather fuer Zuerich
Dependencies: EthernetInterface mbed-rtos mbed spxml
Fork of HTTP_GET by
Mittels Yahoo Weather kann das aktuelle Wetter und eine Vorhersage für einen Bestimmten Ort abgefragt werden.
Links
Beispiel Abfrage Wetter in Zürich
Aufruf mittels curl:
curl http://query.yahooapis.com/v1/public/yql \ -d q="select * from weather.forecast where woeid=784794" -d format=xml
Antwort als XML von Yahoo:
<?xml version="1.0" encoding="UTF-8"?> <query xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" yahoo:count="1" yahoo:created="2016-07-22T13:17:05Z" yahoo:lang="en-US"> <results> <channel> <yweather:units xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" distance="mi" pressure="in" speed="mph" temperature="F" /> <title>Yahoo! Weather - Zurich, ZH, CH</title> <link>http://us.rd.yahoo.com/dailynews/rss/weather/Country__Country/*https://weather.yahoo.com/country/state/city-784794/</link> <description>Yahoo! Weather for Zurich, ZH, CH</description> <language>en-us</language> <lastBuildDate>Fri, 22 Jul 2016 03:17 PM CEST</lastBuildDate> <ttl>60</ttl> <yweather:location xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" city="Zurich" country="Switzerland" region=" ZH" /> <yweather:wind xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" chill="72" direction="150" speed="11" /> <yweather:atmosphere xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" humidity="72" pressure="957.0" rising="0" visibility="16.1" /> <yweather:astronomy xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" sunrise="5:54 am" sunset="9:10 pm" /> <image> <title>Yahoo! Weather</title> <width>142</width> <height>18</height> <link>http://weather.yahoo.com</link> <url>http://l.yimg.com/a/i/brand/purplelogo//uh/us/news-wea.gif</url> </image> <item> <title>Conditions for Zurich, ZH, CH at 02:00 PM CEST</title> <geo:lat xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#">47.38427</geo:lat> <geo:long xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#">8.52959</geo:long> <link>http://us.rd.yahoo.com/dailynews/rss/weather/Country__Country/*https://weather.yahoo.com/country/state/city-784794/</link> <pubDate>Fri, 22 Jul 2016 02:00 PM CEST</pubDate> <yweather:condition xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="39" date="Fri, 22 Jul 2016 02:00 PM CEST" temp="72" text="Scattered Showers" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="4" date="22 Jul 2016" day="Fri" high="77" low="66" text="Thunderstorms" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="47" date="23 Jul 2016" day="Sat" high="76" low="64" text="Scattered Thunderstorms" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="39" date="24 Jul 2016" day="Sun" high="78" low="63" text="Scattered Showers" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="47" date="25 Jul 2016" day="Mon" high="77" low="64" text="Scattered Thunderstorms" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="47" date="26 Jul 2016" day="Tue" high="75" low="64" text="Scattered Thunderstorms" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="4" date="27 Jul 2016" day="Wed" high="75" low="61" text="Thunderstorms" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="30" date="28 Jul 2016" day="Thu" high="76" low="60" text="Partly Cloudy" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="30" date="29 Jul 2016" day="Fri" high="79" low="59" text="Partly Cloudy" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="39" date="30 Jul 2016" day="Sat" high="80" low="58" text="Scattered Showers" /> <yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="30" date="31 Jul 2016" day="Sun" high="78" low="59" text="Partly Cloudy" /> <description></description> <guid isPermaLink="false" /> </item> </channel> </results> </query>
Diff: HTTPClient/HTTPClient.h
- Revision:
- 1:2e29a33cd918
diff -r fb5060c39dd1 -r 2e29a33cd918 HTTPClient/HTTPClient.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HTTPClient/HTTPClient.h Sat Jan 17 14:11:01 2015 +0000 @@ -0,0 +1,199 @@ +/* HTTPClient.h */ +/* Copyright (C) 2012 mbed.org, MIT License + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of this software + * and associated documentation files (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, publish, distribute, + * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or + * substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING + * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/** \file +HTTP Client header file +*/ + +#ifndef HTTP_CLIENT_H +#define HTTP_CLIENT_H + +#include "TCPSocketConnection.h" + +#define HTTP_CLIENT_DEFAULT_TIMEOUT 15000 + +class HTTPData; + +#include "IHTTPData.h" +#include "mbed.h" + +///HTTP client results +enum HTTPResult { + HTTP_OK = 0, ///<Success + HTTP_PROCESSING, ///<Processing + HTTP_PARSE, ///<url Parse error + HTTP_DNS, ///<Could not resolve name + HTTP_PRTCL, ///<Protocol error + HTTP_NOTFOUND, ///<HTTP 404 Error + HTTP_REFUSED, ///<HTTP 403 Error + HTTP_ERROR, ///<HTTP xxx error + HTTP_TIMEOUT, ///<Connection timeout + HTTP_CONN, ///<Connection error + HTTP_CLOSED, ///<Connection was closed by remote host +}; + +/**A simple HTTP Client +The HTTPClient is composed of: +- The actual client (HTTPClient) +- Classes that act as a data repository, each of which deriving from the HTTPData class (HTTPText for short text content, HTTPFile for file I/O, HTTPMap for key/value pairs, and HTTPStream for streaming purposes) +*/ +class HTTPClient +{ +public: + ///Instantiate the HTTP client + HTTPClient(); + ~HTTPClient(); + + /** + Provides a basic authentification feature (Base64 encoded username and password) + Pass two NULL pointers to switch back to no authentication + @param[in] user username to use for authentication, must remain valid durlng the whole HTTP session + @param[in] user password to use for authentication, must remain valid durlng the whole HTTP session + */ + void basicAuth(const char* user, const char* password); //Basic Authentification + + /** + Set custom headers for request. + + Pass NULL, 0 to turn off custom headers. + + @code + const char * hdrs[] = + { + "Connection", "keep-alive", + "Accept", "text/html", + "User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64)", + "Accept-Encoding", "gzip,deflate,sdch", + "Accept-Language", "en-US,en;q=0.8", + }; + + http.basicAuth("username", "password"); + http.customHeaders(hdrs, 5); + @endcode + + @param[in] headers an array (size multiple of two) key-value pairs, must remain valid during the whole HTTP session + @param[in] pairs number of key-value pairs + */ + void customHeaders(const char** headers, size_t pairs); + + //High Level setup functions + /** Execute a GET request on the URL + Blocks until completion + @param[in] url : url on which to execute the request + @param[in,out] pDataIn : pointer to an IHTTPDataIn instance that will collect the data returned by the request, can be NULL + @param[in] timeout waiting timeout in ms (osWaitForever for blocking function, not recommended) + @return 0 on success, HTTP error (<0) on failure + */ + HTTPResult get(const char* url, IHTTPDataIn* pDataIn, int timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking + + /** Execute a GET request on the URL + Blocks until completion + This is a helper to directly get a piece of text from a HTTP result + @param[in] url : url on which to execute the request + @param[out] result : pointer to a char array in which the result will be stored + @param[in] maxResultLen : length of the char array (including space for the NULL-terminating char) + @param[in] timeout waiting timeout in ms (osWaitForever for blocking function, not recommended) + @return 0 on success, HTTP error (<0) on failure + */ + HTTPResult get(const char* url, char* result, size_t maxResultLen, int timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking + + /** Execute a POST request on the URL + Blocks until completion + @param[in] url : url on which to execute the request + @param[out] dataOut : a IHTTPDataOut instance that contains the data that will be posted + @param[in,out] pDataIn : pointer to an IHTTPDataIn instance that will collect the data returned by the request, can be NULL + @param[in] timeout waiting timeout in ms (osWaitForever for blocking function, not recommended) + @return 0 on success, HTTP error (<0) on failure + */ + HTTPResult post(const char* url, const IHTTPDataOut& dataOut, IHTTPDataIn* pDataIn, int timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking + + /** Execute a PUT request on the URL + Blocks until completion + @param[in] url : url on which to execute the request + @param[in] dataOut : a IHTTPDataOut instance that contains the data that will be put + @param[in,out] pDataIn : pointer to an IHTTPDataIn instance that will collect the data returned by the request, can be NULL + @param[in] timeout waiting timeout in ms (osWaitForever for blocking function, not recommended) + @return 0 on success, HTTP error (<0) on failure + */ + HTTPResult put(const char* url, const IHTTPDataOut& dataOut, IHTTPDataIn* pDataIn, int timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking + + /** Execute a DELETE request on the URL + Blocks until completion + @param[in] url : url on which to execute the request + @param[in,out] pDataIn : pointer to an IHTTPDataIn instance that will collect the data returned by the request, can be NULL + @param[in] timeout waiting timeout in ms (osWaitForever for blocking function, not recommended) + @return 0 on success, HTTP error (<0) on failure + */ + HTTPResult del(const char* url, IHTTPDataIn* pDataIn, int timeout = HTTP_CLIENT_DEFAULT_TIMEOUT); //Blocking + + /** Get last request's HTTP response code + @return The HTTP response code of the last request + */ + int getHTTPResponseCode(); + + /** Set the maximum number of automated redirections + @param[in] i is the number of redirections. Values < 1 are + set to 1. + */ + void setMaxRedirections(int i = 1); + + /** get the redirect location url + @returns const char pointer to the url. + */ + const char * getLocation() { + return m_location; + } + +private: + enum HTTP_METH { + HTTP_GET, + HTTP_POST, + HTTP_PUT, + HTTP_DELETE, + HTTP_HEAD + }; + + HTTPResult connect(const char* url, HTTP_METH method, IHTTPDataOut* pDataOut, IHTTPDataIn* pDataIn, int timeout); //Execute request + HTTPResult recv(char* buf, size_t minLen, size_t maxLen, size_t* pReadLen); //0 on success, err code on failure + HTTPResult send(char* buf, size_t len = 0); //0 on success, err code on failure + HTTPResult parseURL(const char* url, char* scheme, size_t maxSchemeLen, char* host, size_t maxHostLen, uint16_t* port, char* path, size_t maxPathLen); //Parse URL + void createauth (const char *user, const char *pwd, char *buf, int len); + int base64enc(const char *input, unsigned int length, char *output, int len); + + //Parameters + TCPSocketConnection m_sock; + + int m_timeout; + + char* m_basicAuthUser; + char* m_basicAuthPassword; + const char** m_customHeaders; + size_t m_nCustomHeaders; + int m_httpResponseCode; + int m_maxredirections; + char * m_location; + +}; + +//Including data containers here for more convenience +#include "data/HTTPText.h" +#include "data/HTTPMap.h" +#include "data/HTTPFile.h" + +#endif