newImage creates a new NRGBA image with the specified dimensions and pixel color data. If the length of pixels is 1, the entire image is filled with

Get retrieves the cached data for the provided key.

Set caches the provided data.

Transform the provided image. img should contain the raw bytes of an encoded image in one of the supported formats (gif, jpeg, or png). The bytes of

evaluateFloat interprets the option value f. If f is between 0 and 1, it is interpreted as a percentage of max, otherwise it is treated as an absolute

transformImage modifies the image m based on the transformations specified in opt.

ServeHTTP handles incoming requests.

copyHeader copies values for specified headers from src to dst, adding to any existing values with the same header name.

hostMatches returns whether the host in u matches one of hosts.

NewRequest parses an http.Request into an imageproxy Request. Options and the remote image URL are specified in the request path, formatted as: {opti

ParseOptions parses str as a list of comma separated transformation options. The options can be specified in in order, with duplicate options overwrit

NewProxy constructs a new proxy. The provided http RoundTripper will be used to fetch remote URLs. If nil is provided, http.DefaultTransport will be

peekContentType peeks at the first 512 bytes of p, and attempts to detect the content type. Returns empty string if error occurs.

should304 returns whether we should send a 304 Not Modified in response to req, based on the response resp. This is determined using the last modifie

Delete deletes the cached data at the specified key.

String returns the request URL as a string, with r.Options encoded in the URL fragment.

allowed determines whether the specified request contains an allowed referrer, host, and signature. It returns an error if the request is not allowed

contentTypeMatches returns whether contentType matches one of the allowed patterns.

cropParams calculates crop rectangle parameters to keep it in image bounds

parseURL parses s as a URL, handling URLs that have been munged by path.Clean or a webserver that collapses multiple slashes. The returned enc bool in

parseURL parses s as either an imageproxy request URL or a remote URL with options in the URL fragment. Any existing signature values are stripped, a

returns whether the referrer from the request is in the host list.

resizeParams determines if the image needs to be resized, and if so, the dimensions to resize to.

transform returns whether o includes transformation options. Some fields are not transform related at all (like Signature), and others only apply in

trimEdges returns a new image with solid color borders of the image removed. The pixel at the top left corner is used to match the border color.

updateCacheHeaders updates the cache-control headers in the provided headers. If the cache-control header includes the 'private' directive, then 'no-

validSignature returns whether the request signature is valid.

New constructs a Cache storing files in the specified GCS bucket. If prefix is not empty, objects will be prefixed with that path. Credentials should

New constructs a cache configured using the provided URL string. URL should be of the form: "s3://region/bucket/optional-path-prefix". Credentials s

Parse takes a prefix string and exposes environment variables for all flags in the default FlagSet (flag.CommandLine) in the form of PREFIX_FLAGNAME.

RoundTrip implements the http.RoundTripper interface.

read EXIF orientation tag from r and adjust opt to orient image correctly.

lruCache creates an LRU Cache with the specified options of the form "maxSize:maxAge". maxSize is specified in megabytes, maxAge is a duration.

parseCache parses c returns the specified Cache implementation.

parseCache parses c returns the specified Cache implementation.

update takes a prefix string p and *flag.FlagSet. Each flag in the FlagSet is exposed as an upper case environment variable prefixed with p. Any flag

CaddyModule returns the Caddy module information.

Test that request URLs are properly parsed into Options and RemoteURL. This test verifies that invalid remote URLs throw errors, and that valid combi

test that 304 Not Modified responses are returned properly.