temporary-files

问题 I'm building an blog system, which allow user add image to their blog. when user add image, the image will be upload automatically, this happened before the blog is posted, so how should I handle the uploaded image, these image is kind of like temporary image, because if the user post the blog, these images will have an foreign key to this blog , and saved into some folder,but if the user discard the blog , these temporary images should be deleted. the problem is how to get the firstly

问题 I am writing a Python script in which I write output to a temporary file and then move that file to its final destination once it is finished and closed. When the script finishes, I want the output file to have the same permissions as if it had been created normally through open(filename,"w") . As it is, the file will have the restrictive set of permissions used by the tempfile module for temp files. Is there a way for me to figure out what the "default" file permissions for the output file

问题 When does iOS clean the local app ./tmp directory? Note that this is not a dupe of this question. I'm asking about the app specific temporary folder, not the system wide one. You can use iExplorer to have a look at ./tmp directories on non-jailbroken phones. (Note: I'm asking this out of curiosity only. I kind of suspect that these never get deleted unless you restore your phone from a backup or reinstall that particular app. But obviously you cannot count on that for semi-permanently storing

问题 My app is sandboxed (as per the latest App Store guidelines), and I want to create some temporary files. Am I allowed to do so? If "yes", WHERE am I allowed to do it? Is there any prespecified path? (And a command to access that path?) 回答1: You should use the NSTemporaryDirectory() function, which will find and return the appropriate temporary folder for your application (regardless of sandbox status, OS version, and a host of other things). Take a look at this Cocoa With Love post for much

问题 UPDATE 2 / TL;DR Is there some way to prevent dirty pages from a windows temporary delete-on-close file being flushed as a result of closing memory maps opened on these files. Yes. If you do not need to do anything with the files themselves after their initial creation and you implement some naming conventions, this is possible through the strategy explained in this answer. Note: I am still quite interested in finding out the reasons for why there is so much difference in the behavior

问题 Running the following code on Windows 7 x64 #include <stdio.h> #include <errno.h> int main() { int i; FILE *tmp; for (i = 0; i < 10000; i++) { errno = 0; if(!(tmp = tmpfile())) printf("Fail %d, err %d\n", i, errno); fclose(tmp); } return 0; } Gives errno 13 (Permission denied), on the 637th and 1004th call, it works fine on XP (haven't tried 7 x86). Am I missing something or is this a bug? 回答1: A bit of a refresher from the manpage of on tmpfile() , which returns a FILE* : The file will be

问题 I'm running a J2SE application that uses Atomikos which dumps it's numerous log files to the current directory. I'd like to move the location of these files to "/tmp", but I cannot locate a configuration property that I can set from within my Spring XML config file. The Atomikos documentation references a property: com.atomikos.icatch.output_dir Which seems exactly what I need, but how to set from Spring it without a jta.properties file? Here is my transaction manager config: <bean id=

问题 I have a multi-threaded Java program that creates hundreds of temporary files in seconds. The files are placed in /tmp and are named using System.nanoTime() . Are the file names guaranteed to be unique? 回答1: No, there is no guarantee that every call to System.nanoTime() will return a unique value. Use File.createTempFile() or Files.createTempFile() instead. They are designed for just this purpose, and will generate unique file names for you. 回答2: If you need unique file names for temporary

问题 I have two issues related to the error: first : I have one merged dem layer and multiple shapefiles, I create a list of masked shapefiles boundary, I was able to plot all of them except one "the first one" which is the biggest one: > plot(DEM_masked_list[[1]]) Error in file(fn, "rb") : cannot open the connection In addition: Warning message: In file(fn, "rb") : cannot open file '/private/var/folders/2w/rjzwcrbn3pg0jmsrfkz7n52h0000gn/T/RtmpkL8Ot5/raster/r_tmp_2018-01-29_014745_982_20879.gri':

问题 I am implementing in Ruby on Rails, and i want to do so, that in my first view, i browse to a file (CSV-file). which i read in and put it in a TempFile. Then in my second view i show for example the first 5 lines. And then in my third view I want to show the first lines again. My controller is: class ProjectImporterController < ApplicationController unloadable def index end end def match file = params[:file] @parsed_file=CSV::Reader.parse(file) sample_count = 5 @original_filename = file