Question

我想保存我从服务器上的其他服务器获取的文件，但问题是当我调用createWriteStream时它给了我错误：

没有这样的文件或目录，打开 E：\ pathtoproject \ myproject的\公共\ profile_14454.jpg

这是我的代码，位于E:\pathtoproject\myproject\modules\dowload.js：

request.head(infos.profile_pic, function(err, res, body) {
  const completeFileName = '../public/profile_14454.' + res.headers['content-type'].split('/')[1];
  var imageStream = fs.createWriteStream(completeFileName);
  imageStream.on('open', function(fd) {
    console.log("File open");
    request(infos.profile_pic).pipe(imageStream).on('close', function(body) {
      consoleLog('Profile pic saved');
      console.log('This is the content of body');
      console.log(body);
      connection.query('UPDATE user set photo=? where id=?', [completeFileName, lastID], function(err, result, fields) {
        if (err) {
          consoleLog('Error while update the profile pic');
        }
      });
    })
  });
});

当我删除目录../public/并仅保留文件名时 profile_14454.' + res.headers['content-type'].split('/')[1]，它有效，但文件保存在项目的根目录（E:\pathtoproject\myproject\）中。

我在做什么有什么问题？如何将文件保存在公共目录下？

我正在使用nodeJS 8.9.4

Answer 1

我尝试使用我的小代码。

library(wordcloud2)
library(dplyr)

text <- c("anatomical_structure_development",
          "nucleic_acid_binding_transcription_factor_activity",
          "molecular_function",
          "biological_process",
          "biosynthetic_process",
          "cellular_nitrogen_compound_metabolic_process",
          "embryo_development",
          "anatomical_structure_formation_involved_in_morphogenesis",
          "immune_system_process",
          "biosynthetic_process",
          "cellular_nitrogen_compound_metabolic_process",
          "embryo_development")

# wordcloud2 needs a data.frame with frequencies. This will generate the table from the text.
df <- text %>% data_frame(words = .) %>% 
  group_by(words) %>% 
  summarise(freq = n())

wordcloud2(df)

我的代码在此路径中var fs = require("fs"); var data = 'Simply Easy Learning'; // Create a writable stream var writerStream = fs.createWriteStream('./airo/output.txt'); // Write the data to stream with encoding to be utf8 writerStream.write(data,'UTF8'); // Mark the end of file writerStream.end(); // Handle stream events --> finish, and error writerStream.on('finish', function() { console.log("Write completed."); }); writerStream.on('error', function(err){ console.log(err.stack); }); console.log("Program Ended");现在我想将文件存储在此路径中的E:\syed ayesha\nodejs\nodejs文件夹中。所以我用一个点来存储。希望这会有所帮助。

fs.createWriteStream，没有这样的文件或目录，打开Nodejs

1 个答案: