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minimalistic-wallpaper-collection
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Display image contents instead of redirecting if small enough (#78)

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Jonah Lawrence 2022-10-08 20:41:06 -06:00 committed by GitHub
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4
README.md
View File

@ -34,6 +34,10 @@ https://minimalistic-wallpaper.demolab.com/?random=3
This API can be used for setting daily wallpapers on a mobile device by combining it with an app such as IFTTT.
> **Note**
> By default, the API will fetch the image from GitHub and return it as content if it is smaller than 4.5MB.
> To force the API to redirect to the image on GitHub instead, add `&redirect=1` to the end of the URL.
## Contributing
All images appearing in the images directory contain the author (sometimes this is the original artist, for others, this is a Reddit user who shared the image or a website the image was found on in cases where the original artist is unknown) and the title or description of the wallpaper.

58
api/index.php
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@ -1,5 +1,12 @@
<?php
/**
* Fetch the contents of a URL with cURL
*
* @param string $url The URL to fetch
* @param string $userAgent The user agent to use
* @return string The contents of the URL
*/
function curlGetContents($url, $userAgent)
{
$ch = curl_init();
@ -16,6 +23,39 @@ function curlGetContents($url, $userAgent)
return $response;
}
/**
* Fetch an image, if it is larger than 4.5MB, redirect to it
* otherwise, return the image as content
*
* @param string $url The URL to fetch
* @param string $userAgent The user agent to use
* @param bool $redirect Whether to force a redirect
*/
function displayImage($url, $userAgent, $redirect)
{
// don't need to fetch the image if we're redirecting
$contents = $redirect ? "" : curlGetContents($url, $userAgent);
// redirect if redirect is set or the image is larger than 4.5MB
if ($redirect || strlen($contents) > 4500000) {
header("Location: $url");
exit;
}
// set content type
if (preg_match("/\.(jpg|jpeg)$/", $url)) {
header('Content-Type: image/jpeg');
} elseif (preg_match("/\.(png)$/", $url)) {
header('Content-Type: image/png');
} elseif (preg_match("/\.(gif)$/", $url)) {
header('Content-Type: image/gif');
}
// set default filename
header('Content-Disposition: inline; filename="' . basename($url) . '"');
// output the image
exit($contents);
}
$REPO = "DenverCoder1/minimalistic-wallpaper-collection";
$BRANCH_NAME = "main";
@ -30,19 +70,23 @@ $IMGPROXY_PREFIX = "https://dc1imgproxy.fly.dev/x/rs:auto:332:200:1/plain/" . ur
// API url to get a listing of images in the directory on GitHub
$GITHUB_API_URL = "https://api.github.com/repos/$REPO/contents/$IMAGES_DIRECTORY/";
// whether to force a redirect to the image instead of displaying it directly
$redirect = isset($_GET['redirect']) ? $_GET['redirect'] === "1" : false;
// if the current URL is in the form "/images/...", show the image
if (preg_match("/\/images\/(.*)$/", $_SERVER['REQUEST_URI'], $matches)) {
$image_path = $BASE_URL . $matches[1];
displayImage($image_path, $REPO, $redirect);
}
// fetch the list of images from GitHub
$images = json_decode(curlGetContents($GITHUB_API_URL, $REPO));
// if the random query string parameter is set, pick a random image
if (isset($_GET['random'])) {
// get the image url
$random_image_path = $images[array_rand($images)]->download_url;
header("Location: $random_image_path");
}
// if the current URL is in the form "/images/...", show the image
if (preg_match("/\/images\/(.*)$/", $_SERVER['REQUEST_URI'], $matches)) {
$image_path = $BASE_URL . $matches[1];
header("Location: $image_path");
displayImage($random_image_path, $REPO, $redirect);
}
?>
<!DOCTYPE html>