Swift

Get Size of File on Web Server

See more HTTP Examples

Demonstrates how to send a HEAD request to fetch information about a file on a web server, which hopefully includes the Content-Length in the response header. Swift

func chilkatTest() {
    var success: Bool = false

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let http = CkoHttp()!

    let resp = CkoHttpResponse()!
    success = http.httpNoBody(verb: "HEAD", url: "https://nodejs.org/dist/v10.16.1/node-v10.16.1-win-x64.zip", response: resp)
    if success == false {
        print("\(http.lastErrorText!)")
        return
    }

    // Examine the response header.
    print("\(resp.header!)")

    // Here is a sample response header:

    // Date: Thu, 01 Aug 2019 12:47:27 GMT
    // Content-Type: application/zip
    // Content-Length: 17457922
    // Connection: keep-alive
    // Set-Cookie: __cfduid=da5b78dcdd8171683c5a578eb9c9f88c81564663647; expires=Fri, 31-Jul-20 12:47:27 GMT; path=/; domain=.nodejs.org; HttpOnly
    // Last-Modified: Wed, 31 Jul 2019 18:21:57 GMT
    // ETag: "5d41dc45-10a6302"
    // Accept-Ranges: bytes
    // Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
    // Server: cloudflare
    // CF-RAY: 4ff7ebb32ac4e1e2-ORD

    // Get the Content-Length header.
    var contentLengthStr: String? = resp.getHeaderField(fieldName: "Content-Length")
    // If the header exists...
    if resp.lastMethodSuccess == true {
        print("Content-Length: \(contentLengthStr!)")
        // Your application can convert the contentLengthStr to an integer and then use it....
    }


}