在大三上的课程中，海涛老师要求项目中运用rest进行数据采集。我两&＃30524;懵&＃36924;，啥是rest呀？然后就去网上找了学习资料。然后之后就着手开始自己写一个rest api。为什么要自己写呢？因为我没用框架
，第一次使用php做网站，我想先打好基础再考虑高层次的东西，就没有用框架。其他人用的诸如laravel之类的PHP框架自己本身会带rest机制。对于我一个没用框架的孩子，只能自己默默写了。
当然，有参考例子哦http://www.gen-x-design.com/archives/create-a-rest-api-with-php/，不过这个例子一点都不全面，我自己补充了很多。
setMethod($request_method);
// set the raw data, so we can access it if needed (there may be
// other pieces to your requests)
$return_obj->setRequestVars($data);
if(isset($data[&＃39;data&＃39;]))
{
// translate the JSON to an Object for use however you want
$return_obj->setData(json_decode($data[&＃39;data&＃39;]));
}
return $return_obj;
}
public static function sendResponse($status = 200, $body = &＃39;&＃39;, $content_type = &＃39;text/html&＃39;)
{
$status_header = &＃39;HTTP/1.1 &＃39; . $status . &＃39; &＃39; . RestUtils::getStatusCodeMessage($status);
// set the status
header($status_header);
// set the content type
header(&＃39;Content-type: &＃39; . $content_type);
// pages with body are easy
if($body != &＃39;&＃39;)
{
// send the body
echo $body;
exit;
}
// we need to create the body if none is passed
else
{
// create some body messages
$message = &＃39;&＃39;;
// this is purely optional, but makes the pages a little nicer to read
// for your users. Since you won&＃39;t likely send a lot of different status codes,
// this also shouldn&＃39;t be too ponderous to maintain
switch($status)
{
case 401:
$message = &＃39;You must be authorized to view this page.&＃39;;
break;
case 404:
$message = &＃39;The requested URL &＃39; . $_SERVER[&＃39;REQUEST_URI&＃39;] . &＃39; was not found.&＃39;;
break;
case 500:
$message = &＃39;The server encountered an error processing your request.&＃39;;
break;
case 501:
$message = &＃39;The requested method is not implemented.&＃39;;
break;
}
// servers don&＃39;t always have a signature turned on (this is an apache directive "ServerSignature On")
$signature = ($_SERVER[&＃39;SERVER_SIGNATURE&＃39;] == &＃39;&＃39;) ? $_SERVER[&＃39;SERVER_SOFTWARE&＃39;] . &＃39; Server at &＃39; . $_SERVER[&＃39;SERVER_NAME&＃39;] . &＃39; Port &＃39; . $_SERVER[&＃39;SERVER_PORT&＃39;] : $_SERVER[&＃39;SERVER_SIGNATURE&＃39;];
// this should be templatized in a real-world solution
$body = &＃39;
&＃39; . RestUtils::getStatusCodeMessage($status) . &＃39;
&＃39; . $message . &＃39;
&＃39; . $signature . &＃39;
&＃39;;
echo $body;
exit;
}
}
public static function getStatusCodeMessage($status)
{
// these could be stored in a .ini file and loaded
// via parse_ini_file()... however, this will suffice
// for an example
$codes = Array(
100 => &＃39;Continue&＃39;,
101 => &＃39;Switching Protocols&＃39;,
200 => &＃39;OK&＃39;,
201 => &＃39;Created&＃39;,
202 => &＃39;Accepted&＃39;,
203 => &＃39;Non-Authoritative Information&＃39;,
204 => &＃39;No Content&＃39;,
205 => &＃39;Reset Content&＃39;,
206 => &＃39;Partial Content&＃39;,
300 => &＃39;Multiple Choices&＃39;,
301 => &＃39;Moved Permanently&＃39;,
302 => &＃39;Found&＃39;,
303 => &＃39;See Other&＃39;,
304 => &＃39;Not Modified&＃39;,
305 => &＃39;Use Proxy&＃39;,
306 => &＃39;(Unused)&＃39;,
307 => &＃39;Temporary Redirect&＃39;,
400 => &＃39;Bad Request&＃39;,
401 => &＃39;Unauthorized&＃39;,
402 => &＃39;Payment Required&＃39;,
403 => &＃39;Forbidden&＃39;,
404 => &＃39;Not Found&＃39;,
405 => &＃39;Method Not Allowed&＃39;,
406 => &＃39;Not Acceptable&＃39;,
407 => &＃39;Proxy Authentication Required&＃39;,
408 => &＃39;Request Timeout&＃39;,
409 => &＃39;Conflict&＃39;,
410 => &＃39;Gone&＃39;,
411 => &＃39;Length Required&＃39;,
412 => &＃39;Precondition Failed&＃39;,
413 => &＃39;Request Entity Too Large&＃39;,
414 => &＃39;Request-URI Too Long&＃39;,
415 => &＃39;Unsupported Media Type&＃39;,
416 => &＃39;Requested Range Not Satisfiable&＃39;,
417 => &＃39;Expectation Failed&＃39;,
500 => &＃39;Internal Server Error&＃39;,
501 => &＃39;Not Implemented&＃39;,
502 => &＃39;Bad Gateway&＃39;,
503 => &＃39;Service Unavailable&＃39;,
504 => &＃39;Gateway Timeout&＃39;,
505 => &＃39;HTTP Version Not Supported&＃39;
);
return (isset($codes[$status])) ? $codes[$status] : &＃39;&＃39;;
}
}
class RestRequest
{
private $request_vars;
private $data;
private $http_accept;
private $method;
public function __construct()
{
$this->request_vars = array();
$this->data = &＃39;&＃39;;
$this->http_accept = (strpos($_SERVER[&＃39;HTTP_ACCEPT&＃39;], &＃39;json&＃39;)) ? &＃39;json&＃39; : &＃39;xml&＃39;;
$this->method = &＃39;get&＃39;;
}
public function setData($data)
{
$this->data = $data;
}
public function setMethod($method)
{
$this->method = $method;
}
public function setRequestVars($request_vars)
{
$this->request_vars = $request_vars;
}
public function getData()
{
return $this->data;
}
public function getMethod()
{
return $this->method;
}
public function getHttpAccept()
{
return $this->http_accept;
}
public function getRequestVars()
{
return $this->request_vars;
}
}
$data = RestUtils::processRequest();
switch($data->getMethod())
{
case &＃39;get&＃39;:
// print_r($data->getRequestVars());
$infoType=$data->getRequestVars()[&＃39;infoType&＃39;];
if (array_key_exists("username",$data->getRequestVars())) {
$username=$data->getRequestVars()[&＃39;username&＃39;];
if($data->getHttpAccept() == &＃39;json&＃39;){
if($infoType=="health"){
$healthService=new HealthService();
$result=$healthService->getUserHealth($username);
if($result==""){
RestUtils::sendResponse(404, "Not Found");
}
else{
RestUtils::sendResponse(200, json_encode($result), &＃39;application/json&＃39;);
}
}
}
else if ($data->getHttpAccept() == &＃39;xml&＃39;){
if($infoType=="health"){
$healthService=new HealthService();
$result=$healthService->getUserHealth($username);
if($result==""){
RestUtils::sendResponse(404, "NOT FOUND");
}
else{
$health=new HealthXML();
RestUtils::sendResponse(200, $health->create_xml($result),&＃39;application/xml&＃39;);
}
}
}
}
break;
case &＃39;post&＃39;:
$infoType=$data->getRequestVars()[&＃39;infoType&＃39;];
if($infoType=="health"){
$username=$data->getRequestVars()[&＃39;username&＃39;];
$height=$data->getRequestVars()[&＃39;height&＃39;];
$weight=$data->getRequestVars()[&＃39;weight&＃39;];
$date=$data->getRequestVars()[&＃39;date&＃39;];
$healthService=new HealthService();
$ID=$healthService->addHealthWithDate($username, $height, $weight, $date);
$health=new HealthXML();
$data_array = array(
array(
&＃39;ID&＃39; => $ID,
)
);
RestUtils::sendResponse(201, $health->create_IDxml($data_array));
}
break;
case &＃39;put&＃39;:
// print_r($data->getRequestVars());
$infoType=$data->getRequestVars()[&＃39;infoType&＃39;];
// echo $infoType;
// echo $infoType=="health"?"true":"false";
if($infoType=="health"){
$ID=$data->getRequestVars()[&＃39;ID&＃39;];
$username=$data->getRequestVars()[&＃39;username&＃39;];
$height=$data->getRequestVars()[&＃39;height&＃39;];
$weight=$data->getRequestVars()[&＃39;weight&＃39;];
$date=$data->getRequestVars()[&＃39;date&＃39;];
$healthService=new HealthService();
$result=$healthService->modifyHealthWithDate($ID, $username, $height, $weight, $date);
if($result=="false"){
RestUtils::sendResponse(400, "Bad Request");
}
else{
$health=new HealthXML();
RestUtils::sendResponse(200, $health->create_xml($result),&＃39;application/xml&＃39;);
}
}
break;
case &＃39;delete&＃39;:
$infoType=$data->getRequestVars()[&＃39;infoType&＃39;];
if($infoType=="health"){
$ID=$data->getRequestVars()[&＃39;ID&＃39;];
$healthService=new HealthService();
$result=$healthService->deleteHealth($ID);
if($result==false){
RestUtils::sendResponse(404, "Not Found");
}
else{
RestUtils::sendResponse(204, "No Content");
}
}
break;
}
class HealthXML{
// 创建XML单项
function create_item($ID_data,$username_data, $height_data , $weight_data, $dateTime_data)
{
$item = "- \n";
$item .= "
" . $ID_data . " \n";
$item .= "" . $username_data . " \n";
$item .= "" . $height_data . " \n";
$item .= "" . $weight_data . " \n";
$item .= " " . $dateTime_data . " \n";
$item .= " \n";
return $item;
}
function create_xml($data_array){
$title_size = 1;
$xml = "\n";
$xml .= "\n";
foreach ($data_array as $data) {
$xml .= $this->create_item($data[&＃39;ID&＃39;],$data[&＃39;username&＃39;], $data[&＃39;height&＃39;], $data[&＃39;weight&＃39;],$data[&＃39;dateTime&＃39;]);
}
$xml .= " \n";
return $xml;
}
// 创建XML单项
function create_IDitem($ID_data)
{
$item = "- \n";
$item .= "
" . $ID_data . " \n";
$item .= " \n";
return $item;
}
function create_IDxml($data_array){
$title_size = 1;
$xml = "\n";
$xml .= "\n";
foreach ($data_array as $data) {
$xml .= $this->create_IDitem($data[&＃39;ID&＃39;]);
}
$xml .= " \n";
return $xml;
}
}
?>难点是对于http请求头的解析真是让我吐血啊，那个时候我还不知道chrome可以看请求内容，我的做法是简陋地输出来看。之后解析时狂补了一通正则表达式，最后用正则顺利解析了。
我这不能API直接用啊，里面有我网站里分析健康数据的例子，你们也可以看到，后半段大量地出现“health"，就是我的网站中的获取健康数据的例子啊。
因为时间紧急，所以只用半天写出来的API，大概是又简陋又有很多不足的吧。不过想到这个项目最终检查时有那么多同学没有实现rest，而我没有用框架自己学习rest，实现了一个自己的api，也是挺开心的。
以上就介绍了自己创建一个Rest API，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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