So I was able to get the AppData folder via SHGetKnownFolderPath and converted the memory address it printed to a readable string via
SHGetKnownFolderPath(FOLDERID_RoamingAppData, NULL, NULL, &wszPath);
_bstr_t bstrPath(wszPath);
std::string strPath((char*)bstrPath);
newstring.append(strPath);
newstring.append(secondvar);
So you probably noticed the newstring.append. What I do is append the folder name I want and file to the end of the AppData location which is C:\Users\*Username*\AppData\Roaming(and append here my folder and file).
Then I use cURL to send the file from newstring to my cURL function called sendfile, however because of the hacks I tried to convert the memory address to a readable string and then append the other information, I then got a heap corrupted message.
I then tried manually putting the path to the directory and file to cURL function curl_formadd and it still wouldn't work. However, if there is a file where the application is, and use it for sending through HTTP, it works. If I add a full path, i.e C:\Users\*Username*\AppData\Roaming\myfolder\myfile.txt to the curl_formadd function, nothing happens.
So how do I go about fetching that file from the directory I want and sending it with cURL?
Related
I have a medium size program I'm developing using eclipse, I can't show the content because it would be too large. At some point I have some lines of fopen, I'm basically trying to create a new file and printing inside such file a content that has been derived from some processing.
So my line is something like a classic
FILE* f = fopen(filename,"w");
where filename is a char array large enough. However the FILE* returned is 0, and when I check the errno it is number 2, which means that the file doesn't exists.
However that's the point, I was trying to create a new file.
Is there something you could suggest that can I further check?
It's worth to note I'm running this stuff on unix, not windows.
Is the value of filename an absolute path or a relative one? If it's the latter, then probably the process you run hasn't the cwd (current working directory) you think it has.
Try using an absolute path, if that works then
use the chdir system call at the begin of main to set the cwd
Your filename might be incorrectly built, or you have no access to the path, or parts of the path don't exist.
Try a simple and clearly legal path first, like C:\\Temp\\x.x or something similar. if this works, it is not your code, but the filename.
I am trying to extract information from "about:plugins" website when you use Firefox web browser. I want to be able to use the contents of the website in my C++ program. Only way I know how to use content from another location is reading from a file.
What I am trying to do is read the file name and file path for each plugin from about:plugin'
Not sure if I could send this information to a file and then read it from there, but that seems like double work since if it output to file, I could just read it from there.
Needed to know how to extract information from the Firefox website in order to be used in a C++ program.
Just parse the pluginreg.dat file, you can find it in:
C:\Users\xxxxxxx\AppData\Roaming\Mozilla\Firefox\Profiles\xxxxxx.default
To obtain the AppData
char cAppData[MAX_PATH];
if(SHGetSpecialFolderPathA(NULL, cAppData, CSIDL_APPDATA, false))
{
// To obtain the profile name, parse the profiles.ini file in the folder
// ...AppData\Roaming\Mozilla\Firefox
// ...
}
I am working on an NaCl plugin for Chrome, and trying to download a URL resource file locally, into the temporary cache of Chrome, but without success.
Here is how I proceed:
// I indicate that I want the resource to be downloaded to a file
m_URLRequestInfo.SetStreamToFile( true );
// I open the request:
m_URLLoader.Open( m_URLRequestInfo, m_CCFactory.NewCallback( &MyClass::OnOpen ) );
...
// My callback (OnOpen) is eventually called.
// I then check to make sure the status code is 200 using this call:
m_URLLoader.GetResponseInfo().GetStatusCode()
// Then I ask to download the whole file:
m_URLLoader.FinishStreamingToFile( m_CCFactory.NewOptionalCallback( &MyClass::OnFileDownloaded ) );
...
// My other callback (OnFileDownloaded) gets eventually called,
// and again the status code is 200.
// Then I query the FileRef using this call:
pp::FileRef l_FileRef = m_URLLoader.GetResponseInfo().GetBodyAsFileRef();
The returned pp::FileRef seems to be fine, but pp::FileRef::GetFileSystemType() returns PP_FILESYSTEMTYPE_EXTERNAL, and then the call to pp::FileRef::GetPath() fails (it returns an UNDEFINED pp::Var).
So from this point, I am lost. I don't know what else I should do to get a valid pp::FileRef that points to a local file in the browser's cache. My final goal is to open this local file (an image file in my case) using a standard system file IO like fopen().
Thanks for any light !
Is there a reason you can't use the nacl_io library instead? With it you can write something like this:
#include <stdio.h>
#include <sys/mount.h>
// Mount an HTTP filesystem that reads files from "http://example.com/path/...".
mount("http://example.com/path/", "/mnt/http", "httpfs", 0, "");
// Performs a URL Request of "http://example.com/path/my_image.png".
FILE* file = fopen("/mnt/http/my_image.png", "r");
...
Take a look a the nacl_io demo in the SDK. It is located at $NACL_SDK_ROOT/examples/demo/nacl_io.
After reading more thoroughly the documentation and running more tests, I finally figured out what I was doing wrong.
When we call pp::URLLoader::FinishStreamingToFile, then the file is downloaded in Browser's cache, but it cannot be opened/read using regular stdio services like fopen, fread etc. We need to use the pp::FileIO class services to open the obtained pp::FileRef and read the content of the file.
So here is what I did to successfully load and read a file that was downloaded for me by the Browser. Basically, I continued to use the C++ PPAPI services.
(1) upon callback from m_URLLoader->FinishStreamingToFile, we then call m_FileIO->Open to open the downloaded file using the obtained FileRef;
(2) upon callback from m_FileIO->Open, we then call m_FileIO->Query to obtain the size of the downloaded file (and some other file attributes);
(3) upon callback from pp::FileIO::Query, we then check the file attribute type (e.g. not a folder), allocate a memory buffer large enough to hold the whole file content, and start to call pp::FileIO::Read to obtain the file's content;
(4) upon callback from pp::FileIO::Read, if the obtained nResult argument is 0, then we reached the EOF and we finished reading the file content into our memory buffer; if the obtained nResult > 0, then it indicates the number of successfully read bytes, and we call m_FileIO->Read again to continue reading bytes, and storing them at a different offset location into our memory buffer; if the obtained nResult < 0 then an error occurred and we must terminate the reading process.
Many steps, and many callbacks to manage, but in the end this works smoothly.
I'm trying to download a file from the internet to my temp directory.
This is what I have so far:
HRESULT hr;
LPCTSTR Url = _T("linkhere"), File = _T("C:\\test.exe");
hr = URLDownloadToFile (0, Url, File, 0, 0);
This is working fine.
How do I save the file to the temp directory (using GetTempPath)
Since the directory that's used to store temporary files is configurable, you shouldn't hardcode its path into the application. Instead, use GetTempPath() to ask for the path and then use the result as a prefix, meaning you can simply append "temp.exe" to it.
(Btw, you can use "/" instead "\", since constantly having to escape backslashes is both tedious and error prone. For example, instead of "some\random\path\", you write "some/random/path/").
I have been trying the following piece of code that does not work. What I am trying to do is to start executing my exe (one that I created a simple dialog based application using VC6.0) then from inside this application modify its own contents stored on the hard drive.
So there is a running copy of the exe and from this running copy it will open the disk copy into a buffer. Once loaded into a buffer then begin a search for a string. Once the string is found it will be replaced with another string which may not be the same size as the original.
Right now I am having an issue of not being able to open the file on disk for reading/writing. GetLastError returns the following error "ERROR_SHARING_VIOLATION The process cannot access the file because it is being used by another process.".
So what I did I renamed the file on disk to another name (essential same name except for the extension). Same error again about sharing violation. I am not sure why I am getting this sharing violation error code of 32. Any suggestions would be appreciated. I'll ask my second part of the question in another thread.
FILE * pFile;
pFile = fopen ("Test.exe","rb");
if (pFile != NULL)
{
// do something like search for a string
}
else
{
// fopen failed.
int value = GetLastError(); // returns 32
exit(1);
}
Read the Windows part of the File Locking wikipedia entry: you can't modify files that are currently executing.
You can rename and copy them, but you can't change them. So what you are trying to do is simply not possible. (Renaming the file doesn't unlock it at all, it's still the same file after the rename, so still not modifiable.)
You could copy your executable, modify that copy, then run that though.