Php function, download external file directly to browser






















What this mean, among other things, is that your PATH variable is never set. Therefore, you have to use full paths on everything. I believe system will run your program underneith a shell. This allow the program to run in a 'normal' environment. I dunno if anyone else might find this useful, but when I was trying to use the passthru command on Suse9. Thought it might beuseful to note the passthru seems to supress error messages whilst being run in Dos on Windows test on NT.

To show FULL raw output including errors, use system. Remember, you'll also get this error if your file does not have executable permission. PJ's ulimit example is nice; however, if you include multiple commands in the script after the ulimit command, each gets its own, seperate 60 second time slot!

Most programs hang for other reasons than CPU hogging for example, waiting for a database connection so for most purposes the number 60 is rather too high.

The parameter can be found at least in version 5. In fact, on my PHP version 5. XXX" ;? XXX netmask 0xffffffff broadcast XXX inet XXX Otherwise you might encounter Length required error. As the "example 2 Uploading file" says it is deprecated as of PHP 5. To send a post as a different content-type ie.. Some servers will return weird errors like "SSL read: errorlib 0 :func 0 :reason 0 , errno " for the wrong Content-Type, and you may waste many hours of time trying to figure out why!

I spent a couple of days trying to upload a file using a curl post. The problem I ran into was the filename had an ' ' in the middle of it. I'm posting this in the hopes that it will help someone else, and for my own future reference. If anyone can offer insight into why this works or a better way to handle the ' ' symbol in a filename when using curl to upload I would love to hear it.

If you are using curl to do a soap request and consistently get the following error back: The server cannot service the request because the media type is unsupported. You are sending the Content-type of soap 1. Soap 1. A note on the way Curl posts files Not sure why this conflicts, since the documentation doesn't specify as such. The array used to set the POST fields must only contain scalar values. If there is a need to send non-scalar values using a POST request, consider serializing them before transmission.

You can use also use object methods as callback functions. This is usefull if your curl ressource is part of an object handling transfers. The point is : at the opposite of. Just a small detail I too easily overlooked. Just something subtle to watch out for. Why do you care? There are other cases, of course, where this option is extremely useful If you are getting the following error: SSL: certificate subject name 'example. The data argument is data received. Note that its size is variable.

When writing data, as much data as possible will be returned in all invokes. When writing headers, exactly one complete header line is returned for better parsing. The function must return number of bytes actually taken care of. If that amount differs from the amount passed to this function, an error will occur. The length argument is maximum length which can be returned. The function must return string containing the data which were read.

If length of the data is more than maximum length, it will be truncated to maximum length. Returning anything else than a string means an EOF. This is because NTLM authorisation is connect-based, not request-based. If the connection is not kept alive and re-used, cURL can never complete the request. You may notice this if you get a status code or max out the number of redirects. As of at least PHP 5. It will cause cURL to timeout. It causes it to stall waiting for data that will never come.

Sorry, I made a mistake. In this case at best it complicate things, at the worst you perform an operation using the wrong cookie session. It can also increase the chance of failure, waste resources, reduce performance and create mess in the file system.

The plus of persistent is that In some cases it may be used to accelerate across processes but not many people actually need that and when they do there tend to be better options such as using memcached. If someone can edit and merge the comments it would be appreciated.

With the legacy file upload feature, Curl sends the file name of the actual file and there isn't a documented way to change that behaviour. Note that this has been reported not to work in all versions of PHP and I have done the following tests: 5.

I had problems with the Wikimedia software and sending a POST request where the data was more than bytes long. I traced this to cURL adding: Expect: continue to the headers. I hope this note will save you couple of hours debugging :. Example: curl. Took me an hour or so to find out as I wanted to post a reply tweet to twitter which typically start with screenname. This is under the cURL settings. To resolve you need to compile cURL e. Of course you shouldn't disable certificate validation.

I am only doing it because I'm writing code to detect if a site's SSL is broken works with verify peer, doesn't work without. Others maybe are using self-signed certificates and don't want to work out how to make them a root authority. Never ever use live.

That will get rid of the Array to String conversion notice. You may also specify the certificate authority file with an environment variable. The size of the buffer to use for each read. The number of seconds to wait while trying to connect. The number of milliseconds to wait while trying to connect. The number of seconds to keep DNS entries in memory.

The timeout for Expect: continue responses in milliseconds. Head start for ipv6 for the happy eyeballs algorithm. How to deal with headers. The HTTP authentication method s to use. The expected size, in bytes, of the file when uploading a file to a remote site. The maximum amount of persistent connections that are allowed. The maximum amount of HTTP redirections to follow. The HTTP authentication method s to use for the proxy connection.

The port number of the proxy to connect to. To keep this tag extensible you can to add the browser name that can be handled by the script. Application Programming Interface. Subresource Integrity The hash component of the URL of resource and require tags can be used for this purpose. For suitable 'attributes', please consult the appropriate documentation. For example: script tag img tag style tag Code:. The 'remote' argument of the callback function shows whether this value was modified from the instance of another tab true or within this script instance false.

Therefore this functionality can be used by scripts of different browser tabs to communicate with each other. The response helper may be used to generate other types of response instances. This contract provides several helpful methods for generating responses. If you need control over the response's status and headers but also need to return a view as the response's content, you should use the view method:.

Of course, if you do not need to pass a custom HTTP status code or custom headers, you may use the global view helper function. If you would like to create a JSONP response, you may use the json method in combination with the withCallback method:. The download method may be used to generate a response that forces the user's browser to download the file at the given path. The download method accepts a filename as the second argument to the method, which will determine the filename that is seen by the user downloading the file.

Finally, you may pass an array of HTTP headers as the third argument to the method:. Sometimes you may wish to turn the string response of a given operation into a downloadable response without having to write the contents of the operation to disk. You may use the streamDownload method in this scenario.

This method accepts a callback, filename, and an optional array of headers as its arguments:. The file method may be used to display a file, such as an image or PDF, directly in the user's browser instead of initiating a download. This method accepts the path to the file as its first argument and an array of headers as its second argument:.

If you would like to define a custom response that you can re-use in a variety of your routes and controllers, you may use the macro method on the Response facade. The macro function accepts a name as its first argument and a closure as its second argument. The macro's closure will be executed when calling the macro name from a ResponseFactory implementation or the response helper:. Version Master 8.



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