=== Zametki zlogo admina » Chinim otobrazhenie kursov valjut v IP telefonah Grandstream [OBNOVLENO]
 ===


Nad moim rabochim stolom visit telefon Grandstream GXP2110. Dostatochno
udobnaja i besproblemnaja model'. Na e'krane mozhno prosmatrivat' pogodu
(dostatochno tochno i pravil'no) i kursy valjut. I vot e'ti samye kursy
vnezapno perestali otobrazhat'sja.

Prishlos' vzjat' v ruki tcpdump i posmotret', otkuda telefon beret e'ti
dannye. Okazalos', chto on shlet zaprosy tipa:
GET http://download.finance.yahoo.com/d/
333.txt?s=BTCUSD=X&s=EURUSD=X&s=USDRUB=X&s=EURRUB=X&s=CNYRUB=X&f=l1s
I poluchaet v otvet 404 Not Found. Ispravit' adres v nastrojkah net
nikakoj vozmozhnosti.

Nekotoroe vremja ja zhdal, chto proizvoditel' kak-nibud' na e'to
otreagiruet i popravit proshivku, no e'togo tak i ne sluchilos'. Segodnja
ja zashel na sajt za novoj versiej proshivki i obnaruzhil, chto model'
snjata s podderzhki, a problema tak i ne reshena. Znachit, prishlo vremja
podstavljat' kostyl'.

Iz mnozhestva variantov podmeny adresa ja vybral samyj prostoj 
ispol'zovat' proksi. Pod rukoj imelsja testovyj veb-server s nginx.
Hotja to zhe samoe mozhno bylo by provernut' s apache ili squid.

V rasshirennyh setevyh nastrojkah telefona ja zadal HTTP proxy =
server_address:8000 i ubedilsja, chto zaprosy uhodjat kuda nado. Kstati,
e'ta nastrojka primenjaetsja tol'ko posle perezagruzki telefona.

Konfiguracionnyj fajl nginx:

 server {
   listen 8000;
   access_log /var/log/nginx/proxy.access.log main;
   error_log /var/log/nginx/proxy.error.log notice;

   # dlja pogody
   location /forecastrss {
     proxy_pass http://xml.weather.yahoo.com/forecastrss;
   }

   # dlja valjut
   location /d/333.txt {
     proxy_pass http://localhost/grandstream/currency.php;
   }
 }
Fajl currency.php:

 <?php
 $url = 'http://download.finance.yahoo.com/d/quotes.csv?';
 $pairs = array();
 $f = "";

 $params = preg_split('/&/', $_SERVER['QUERY_STRING']);
 foreach ($params as $param) {
   if (preg_match('/^s=/', $param)) $pairs[] = $param;
   elseif (preg_match('/^f=/', $param)) $f = $param;
 }

 foreach ($pairs as $pair) {
   echo file_get_contents($url . $pair . '&' . $f);
 }
 ?>
I vse zavertelos'! Konechno, e'to ne samoe optimal'noe, no vpolne
rabotosposobnoe reshenie. Odnim slovom, kostyl'. Esli kto-nibud'
napishet chto-nibud' bolee interesnoe na e'tu temu, objazatel'no posmotrju,
a mozhet, i ispol'zuju.

UPDATE:
Posle bolee mesjaca uspeshnoj raboty okazalos', chto provajder pochemu-to
zabanil adres, po kotoromu ja poluchal dannye. Prishlos' dobavit' v
skript podderzhku proksi i zaodno uskorit' rabotu putem parallel'noj
obrabotki zaprosov.

UPDATE 2: Dobavlena podderzhka okruglenija kursa, potomu chto na telefone
pomeschaetsja maksimum 8-9 znakov i obrezajutsja pervye cifry.

 <?php

 $url = 'http://download.finance.yahoo.com/d/quotes.csv?';
 $proxy_addr = 'addr:port';
 $proxy_user = 'user:password';
 $round = 2;

 $pairs = array();
 $f = "";

 $params = preg_split('/&/', $_SERVER['QUERY_STRING']);

 foreach ($params as $param) {
    if (preg_match('/^s=/', $param)) $pairs[] = $param;
    elseif (preg_match('/^f=/', $param)) $f = $param;
 }

 $cm = curl_multi_init();
 $cmh = array();

 foreach ($pairs as $pair) {
    $h = curl_setup($url . $pair . '&' . $f);
    curl_multi_add_handle($cm, $h);
    $cmh[] = $h;
 }

 $running = false;
 do {
    curl_multi_exec($cm, $running);
    curl_multi_select($cm);
 } while ($running);

 foreach($cmh as $h) {
    $content = curl_multi_getcontent($h);
    if ($round) {
       list($rate, $name) = explode(',', $content, 2);
       $rate = round((float)$rate, $round);
       echo "${rate},${name} ";
    } else {
       echo $content;
    }

    curl_multi_remove_handle($cm, $h);
 }

 curl_multi_close($cm);

 // ===

 function curl_setup($url)
 {
    global $proxy_addr, $proxy_user;
    $h = curl_init($url);
    curl_setopt($h, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($h, CURLOPT_HEADER, false);
    curl_setopt($h, CURLOPT_TIMEOUT, 10);
    if ($proxy_addr) curl_setopt($h, CURLOPT_PROXY, $proxy_addr);
    if ($proxy_user) curl_setopt($h, CURLOPT_USERPWD, $proxy_user);
    return $h;
 }
 ?>

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