@openfn/language-sftp
v2.0.5
Published
An SFTP language package for use with Open Function
Downloads
223
Keywords
Readme
Language SFTP
Language Pack for building expressions and operations to work with SFTP servers.
Documentation
Configuration
View all the required and optional properties for state.configuration
in the
official
configuration-schema
definition.
List the content of a directory
alterState(state => {
return list('/path/To/Directory')(state).then(response => {
console.log(`There are ${response.data.length} files.`);
return response;
});
});
sample getCSV expression
getCSV('path/to/file.csv', 'utf8', {
quote: 'off',
delimiter: ';',
noheader: true,
filter: {
type: 'startsWith',
key: 'field1',
value: 'JO',
},
});
A more complex example that breaks up the CSV file into multiple payloads for quicker processing.
fn(state => {
return list('/')(state).then(state => {
const targetNames = [
'exportContacts', //example fileName
];
console.log(`Fetching files: ${targetNames}`);
const files = state.data
.filter(file => file.name.split('.')[1] === 'csv')
.filter(file =>
targetNames.some(targetName =>
file.name.toLowerCase().includes(targetName)
)
);
if (files.length === 0) console.log('No new CSV files found.');
return { ...state, data: {}, files };
});
});
each(
'$.files[*]',
fn(state => {
const { configuration, data } = state;
return getCSV(`/${data.name}`)(state).then(async state => {
const headers = state.data
.shift()
.split(';')
.map(h => (h = h.replace(/"/g, '')));
function toObject(item) {
const values = item.split(';');
return Object.fromEntries(
headers.map((k, i) => {
return values[i]
? [k, values[i].replace(/"/g, '')]
: [k, values[i]];
})
);
}
let countInbox = 0;
//to post CSV data as individual Messages to OpenFn Inbox
const postToInbox = async data => {
countInbox++;
console.log(`Sending request ${countInbox} to inbox`);
await new Promise(resolve => setTimeout(resolve, 200));
await http.post({
url: configuration.openfnInboxUrl,
data: data,
maxContentLength: Infinity,
maxBodyLength: Infinity,
})(state);
};
//To split up into multiple, smaller payloads before send to OpenFn Inbox
const chunkSize = 500;
console.log(
state.data.length,
'rows will be sent in',
Math.ceil(state.data.length / chunkSize),
'requests of',
chunkSize,
'rows each.'
);
while (state.data.length > 0) {
console.log('data.length', state.data.length);
await postToInbox({
fileName: data.name,
fileType: data.name.split('-')[0],
uploadDate: new Date(data.modifyTime).toISOString(),
json: state.data.splice(0, chunkSize).map(toObject),
});
}
return { configuration, references: [], data: {} };
});
})
);
sample putCSV expression
This function converts JSON to CSV and post to a server
putCSV('/some/path/to_file.csv', 'utf8', { delimiter: ';', noheader: true });
Get JSON from FTP server
getJSON('path/to/file.json', 'utf8');
Custom request to an http endpoint
This adaptor exports http
from language-common
. Here, we outline the usage
in order to make custom requests to an endpoint. It returns a promise
alterState(state => {
return http
.post({ url: 'yourURL', data: { name: 'Mamadou' } })(state)
.then(response => {
// do something with response;
return response;
});
});
Development
Clone the repo, run pnpm install
.
Run tests using pnpm run test
or pnpm run test:watch
Build the project using pnpm build
.
To build the docs for this repo, pnpm build docs