I know that storing files in database is a little dirty, but I'm need to upload and store a file into a database BLOB and I haven't found any documentation about it and I haven't find any clue, so any help about it will be appreciated.
Thanks in advance,
David
There is nothing special that you'd need to do, simply set the data that you want to store in the appropriate entity property (respectively array key), either as a string, or as a stream.
BLOB columns will automatically be associated with the \Cake\Database\Type\BinaryType database type, where everything that is necessary for storing/reading binary data is being handled.
Here's an abstract example, showing possible use cases
$data = [
'file_a' => file_get_contents('path/to/file.ext'),
'file_b' => fopen('path/to/file.ext', 'r'),
'file_c' => 'foo bar baz'
];
$entity = $Table->newEntity($data);
$Table->save($entity);
The read entities will always hold the data as streams, so you can use them with the Filesystem and Stream functions, like
$handle = $Table->get(1)->file_a;
while (!feof($handle)) {
echo fread($handle, 8192);
}
echo stream_get_contents($Table->get(1)->file_a);
Related
I need to compare 2 company names, one is from a text file, the other from databases. I import a licence in txt file and if the names are different, a notification on page will pop up asking if I want to rename it (new name will be saved in database).
In JavaScript React, I have to write code that can read a text file, specifically one line from it. This line contains the name of the company that I need to compare with the second name which is in the database.
const handleDispalyDialogButtonClick = () => {
if (nametxt! == namedatabase) {
setDisplayDialog(true)
}
handleImportButtonClick();
};
nametxt is to be the name of the company in the text file. This name needs to be imported somehow and assigned to nametxt.
[license]
lic_base=xxxx
lic_nip=xxxx
PC_Nazwa1=name of the company1
PC_Nazwa2=name of the company2
PC_Nazwa3=name of the company3
For example it's like Car=BMW.
Does anyone have a solution how to make a code which gonna import information, and assign it?
You need to put the file you want in your public folder and just fetch it:
fetch('/path/to/the/file').then((response) => response.text())
.then((data) => {
// read file lines here
const fileLines = data.split('\n')
// find the value you are looking for and compare it to the value you get from the database
}
Also, the screenshot you shared looks like a TOML file, you might want to parse that with TOML Parser to make things easier.
For the value on the database, you cannot directly interact with a database from your code. You need to have an extra layer like an API and request the data from there.
I have to create an email and attach an XLSX file. I looked at the BCS_EXAMPLE_7 program.
I have transformed the content with the following method:
TRY.
cl_bcs_convert=>string_to_solix(
EXPORTING
iv_string = lv_content
iv_codepage = '4103'
iv_add_bom = 'X'
IMPORTING
et_solix = pt_binary_content
ev_size = pv_size ).
CATCH cx_bcs.
ls_return-type = text-023.
ls_return-message = text-024.
APPEND ls_return TO pt_return.
ENDTRY.
CONCATENATE lv_save_file_name '_' sy-datum '.xlsx' INTO lv_save_file_name.
lv_attachment_subject = lv_save_file_name.
CONCATENATE '&SO_FILENAME=' lv_attachment_subject INTO ls_attachment_header.
APPEND ls_attachment_header TO lt_attachment_header.
lo_document->add_attachment( i_attachment_type = 'XLS'
i_attachment_subject = lv_attachment_subject
i_attachment_size = pv_size
i_att_content_hex = pt_binary_content
i_attachment_header = lt_attachment_header ).
The email is sent correctly but when I open the attachment I see the error
Cannot open the file because the file extension is incorrect
Could you help me? thanks
That's a normal behavior of Excel, unrelated to ABAP, when the file name has extension .xlsx but doesn't contain data in format corresponding to XLSX. Excel does the same kind of checks for other extensions. If you need more information about these checks, please search the Web.
As I see that your program creates the attachment based on text converted into UTF-16LE code page (SAP code page 4103), I guess that you created the Excel data in format CSV, tab-separated values or even the old Excel XMLSS/XML 2003 format.
In that case, the extension .xlsx is not valid, to avoid the message, use the adequate extension, respectively .csv, .txt or .xml.
If you really need the extension .xlsx for some reason, then you must create the data in XLSX format. You may use the free API abap2xlsx. If you need further assistance about how to use abap2xlsx, please ask a new question (unrelated to email).
NB: maybe you were told to use the extension .xlsx although there is no real need to use it (each format has its own features, but simple unformatted values can be achieved with all formats), in that case you may propose to use a simple format like CSV or tab-separated values.
NB: you may also have the opposite case that Excel sniffs that the file contains data in format corresponding to XLSX, but the file name doesn't have the extension .xlsx, and the same for all other formats, but I can't say what is the exact Excel reaction to each case.
It appears that whatever you have in lv_content isn't actually a valid excel file. You can not just take arbitrary data, give it the extension .xlsx and expect MS Excel to know what to do with it.
Unfortunately, creating valid MS Office files is anything but trivial. It's a format which is theoretically open and based on XML (actually a zip archive containing multiple XML files), but in practice the specification is over a 5000(!) pages long.
Fortunately, there is a library for that. abap2xlsx is an open source (Apache License) library which provides an easy API to create (and read) valid XLSX files in ABAP.
You could also try to open the file with a text editor (eg. NotePad++), maybe this gives a hint of the actual content.
But I guess that something went wrong generating the binary table. Maybe you are using the wrong file size or code page.
Possible problems:
First problem: as correctly said by Sandra you may have invalid content of your lv_content variable, which doesn't correspond to correct XLSX structure.
Second problem: which you already solved, as seen from your coding, BCS classes do not support 4-character extensions.
Here is the sample how to build and send correct XLSX file via mail:
SELECT * UP TO 100 ROWS
FROM spfli
INTO TABLE #DATA(lt_spfli).
cl_salv_table=>factory( IMPORTING r_salv_table = DATA(lr_table)
CHANGING t_table = lt_spfli ).
DATA: lr_xldimension TYPE REF TO if_ixml_node,
lr_xlworksheet TYPE REF TO if_ixml_element.
DATA(lv_xlsx) = lr_table->to_xml( if_salv_bs_xml=>c_type_xlsx ).
DATA(lr_zip) = NEW cl_abap_zip( ).
lr_zip->load( lv_xlsx ).
lr_zip->get( EXPORTING name = 'xl/worksheets/sheet1.xml' IMPORTING content = DATA(lv_file) ).
DATA(lr_file) = NEW cl_xml_document( ).
lr_file->parse_xstring( lv_file ).
* Row elements are under SheetData
DATA(lr_xlnode) = lr_file->find_node( 'sheetData' ).
DATA(lr_xlrows) = lr_xlnode->get_children( ).
* Create new element in the XML file
lr_xlworksheet ?= lr_file->find_node( 'worksheet' ).
DATA(lr_xlsheetpr) = cl_ixml=>create( )->create_document( )->create_element( name = 'sheetPr' ).
DATA(lr_xloutlinepr) = cl_ixml=>create( )->create_document( )->create_element( name = 'outlinePr' ).
lr_xlsheetpr->if_ixml_node~append_child( lr_xloutlinepr ).
lr_xloutlinepr->set_attribute( name = 'summaryBelow' value = 'false' ).
lr_xldimension ?= lr_file->find_node( 'dimension' ).
lr_xlworksheet->if_ixml_node~insert_child( new_child = lr_xlsheetpr ref_child = lr_xldimension ).
* Create xstring and move it to XLSX
lr_file->render_2_xstring( IMPORTING stream = lv_file ).
lr_zip->delete( EXPORTING name = 'xl/worksheets/sheet1.xml' ).
lr_zip->add( EXPORTING name = 'xl/worksheets/sheet1.xml' content = lv_file ).
lv_xlsx = lr_zip->save( ).
DATA lv_size TYPE i.
DATA lt_bintab TYPE solix_tab.
* Convert to binary
CALL FUNCTION 'SCMS_XSTRING_TO_BINARY'
EXPORTING
buffer = lv_xlsx
IMPORTING
output_length = lv_size
TABLES
binary_tab = lt_bintab.
DATA main_text TYPE bcsy_text.
* create persistent send request
DATA(send_request) = cl_bcs=>create_persistent( ).
* create document object from internal table with text
APPEND 'Valid Excel file' TO main_text.
DATA(document) = cl_document_bcs=>create_document( i_type = 'RAW' i_text = main_text i_subject = 'Test Created for stella' ).
DATA lt_att_head TYPE soli_tab.
APPEND '<(>&< )>SO_FILENAME=MySheet.xlsx' TO lt_att_head.
* add the spread sheet as attachment to document object
document->add_attachment(
i_attachment_type = 'xls'
i_attachment_subject = 'MySheet'
i_attachment_size = CONV so_obj_len( lv_size )
i_attachment_header = lt_att_head
i_att_content_hex = lt_bintab ).
send_request->set_document( document ).
DATA(recipient) = cl_cam_address_bcs=>create_internet_address( 'some_recipient#mail.com' ).
send_request->add_recipient( recipient ).
DATA(sent_to_all) = send_request->send( i_with_error_screen = 'X' ).
COMMIT WORK.
I want to save small images in my room database and I have two issues:
How do I save an image in my database?
How do I save multiple images in my database?
I tried saving a bitmap in the way recommended by the developers page (https://developer.android.com/training/data-storage/room/defining-data)
#Parcelize
#Entity(tableName = "image_table")
data class ImgMod(
#PrimaryKey(autoGenerate = true)
var invoiceId: Long = 0L,
#ColumnInfo(name = "image")
var single_img: Bitmap?
): Parcelable
However, I receive the following error:
Cannot figure out how to save this field into database. You can consider adding a type converter for it.
Secondly, I would like to save multiple images in one database entry. But I receive the same error with the following snippets:
#ColumnInfo(name = "imageList")
var img_list: ArrayList<BitMap>
or decoded bitmap as a String
#ColumnInfo(name = "imageList")
var decoded_img_list: ArrayList<String>
I am sorry if this is a very basic question. But how do I have to configure the database/process the data to an image list?
Thank you in advance,
rot8
A very simple way to get images into the database (although I personally discourage it) would be to base-64 encode the bitmaps into a String and put it into a row of the database.
Take in account that bitmaps are very memory heavy; and base64 encoding something increases it's size some more so be careful when loading a bunch of images... I do also think Room and SQLite supports binary data as blobs, so you could just declare a column as ByteArray and it should just work.
What I've been doing in my projects is to write them into the internal or external storage of my app and then store the reference Uri as a String to later be able to retrieve the image from disk.
Something that I discourage even more is to stuff more than one value per row; having a list of stuff inside a coulmn in SQL is definetely not a pattern you should follow. Creating a "join" table should be simple enough or simply an extra column you could use to group them by should be easy enough, right?
I have a website with very simple news system (posting, editting, deleting etc). All my html pages are saved in UTF-8 formatting, everything displayes correctly.
I specify using UTF in every header:
For saving news to database, I use simple scripts like (all values come from a html form):
$newsTitel = isset($_POST['title']) ? $_POST['title'] : 'Untitled';
$submitDate = $date = date('Y/m/d');
$content = isset($_POST['newstext']) ? $_POST['newstext'] : 'No content';
include 'includes/dbconnect.php';
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");
$query = mysql_query("INSERT INTO news SET date='$submitDate',subject='$newsTitel',news='$content'");
The data get saved to database but in a weird format (coding). There are characters like à ¡ Ä etc which makes the content almost unreadable. Other problem is that when loading this content back to html forms (for editting news) it displays in this weird coding. When I looked into the specification of the database I use, it says that it saves data in UTF-8.
I use phpMyAdmin to access the MYSQL database.
So to sum it up:
Pages: saved in UTF8, all have correct header
Database: interaction with the server: utf8_czech_ci, tables in the same format
What I do not understand at all is this strange bevaior:
1) I save the data into the database using the script above
2) I take a look into phpMyAdmin and see broken encoding
3) I load the data back into my website and display them using this:
<?php
include 'includes/dbconnect.php';
$data = mysql_query("SELECT * FROM news ORDER BY id DESC limit 20") or die(mysql_error());
while($info = mysql_fetch_array( $data ))
{
echo '<article><h3> '.$info['subject'].'</h3><div id="date">'.$info['date'].'</div>';
echo '<p>'.$info['news']. '</p></article>';
}
?>
The encoding is correct and no weird characters are displayed.
4) I load the exact same data into a html form (for edition purposes) and see the same broken encoding as in the database.
What happened? I really dont get it. I tried fixing this by re-saving everything in utf8, alterign tables and changing their encodings into different utf8 versions etc...
This is example of a data I pass to the database (it is in czech with html tags):
<p>Vařila myšička kašičku</p>
<img src="someImage.jpg">
<p>Další text</p>
Thanks for any help...
The commands for specifying the character set should be:
set names 'utf8';
If you check the result returned from your queries at the moment, what does it say? If I try it in the monitor I get the following:
mysql> set names 'UTF-8';
ERROR 1115 (42000): Unknown character set: 'UTF-8'
Have you tried using set names 'utf8' before connecting for the SELECT as well? The characters you're saying are output make me think you're getting back the correct bytes for UTF-8, but they're being interpreted as ISO-8859-1.
You are not escaping single quotes or some other html chars.
Use mysql_real_escape_string.
$newsTitel = isset($_POST['title']) ? mysql_real_escape_string($_POST['title']) : 'Untitled';
I'm currently trying to attach image files to a model directly from a zip file (i.e. without first saving them on a disk). It seems like there should be a clearer way of converting a ZipEntry to a Tempfile or File that can be stored in memory to be passed to another method or object that knows what to do with it.
Here's my code:
def extract (file = nil)
Zip::ZipFile.open(file) { |zip_file|
zip_file.each { |image|
photo = self.photos.build
# photo.image = image # this doesn't work
# photo.image = File.open image # also doesn't work
# photo.image = File.new image.filename
photo.save
}
}
end
But the problem is that photo.image is an attachment (via paperclip) to the model, and assigning something as an attachment requires that something to be a File object. However, I cannot for the life of me figure out how to convert a ZipEntry to a File. The only way I've seen of opening or creating a File is to use a string to its path - meaning I have to extract the file to a location. Really, that just seems silly. Why can't I just extract the ZipEntry file to the output stream and convert it to a File there?
So the ultimate question: Can I extract a ZipEntry from a Zip file and turn it directly into a File object (or attach it directly as a Paperclip object)? Or am I stuck actually storing it on the hard drive before I can attach it, even though that version will be deleted in the end?
UPDATE
Thanks to blueberry fields, I think I'm a little closer to my solution. Here's the line of code that I added, and it gives me the Tempfile/File that I need:
photo.image = zip_file.get_output_stream image
However, my Photo object won't accept the file that's getting passed, since it's not an image/jpeg. In fact, checking the content_type of the file shows application/x-empty. I think this may be because getting the output stream seems to append a timestamp to the end of the file, so that it ends up looking like imagename.jpg20110203-20203-hukq0n. Edit: Also, the tempfile that it creates doesn't contain any data and is of size 0. So it's looking like this might not be the answer.
So, next question: does anyone know how to get this to give me an image/jpeg file?
UPDATE:
I've been playing around with this some more. It seems output stream is not the way to go, but rather an input stream (which is which has always kind of confused me). Using get_input_stream on the ZipEntry, I get the binary data in the file. I think now I just need to figure out how to get this into a Paperclip attachment (as a File object). I've tried pushing the ZipInputStream directly to the attachment, but of course, that doesn't work. I really find it hard to believe that no one has tried to cast an extracted ZipEntry as a File. Is there some reason that this would be considered bad programming practice? It seems to me like skipping the disk write for a temp file would be perfectly acceptable and supported in something like Zip archive management.
Anyway, the question still stands:
Is there a way of converting an Input Stream to a File object (or Tempfile)? Preferably without having to write to a disk.
Try this
Zip::ZipFile.open(params[:avatar].path) do |zipfile|
zipfile.each do |entry|
filename = entry.name
basename = File.basename(filename)
tempfile = Tempfile.new(basename)
tempfile.binmode
tempfile.write entry.get_input_stream.read
user = User.new
user.avatar = {
:tempfile => tempfile,
:filename => filename
}
user.save
end
end
Check out the get_input_stream and get_output_stream messages on ZipFile.