How to solve error Content-Mismatch on Creating Laravel Project

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This is an article where the article itself is focusing on how to solve error which is displaying Content-Mismatch error upon creating laravel-based web application project. The error appears when the command for creating a laravel-based web application project using composer command has been executed. The output of the command execution with the error messageĀ  as shown in the article’s title can be shown below :

user@hostname:/var/www/html$ composer create-project --prefer-dist laravel/laravel app
Content-Length mismatch
http://packagist.org could not be fully loaded, package information was loaded from the local cache and may be out of date
^C
...

After executing a command which is shown as follows :

composer create-project --prefer-dist laravel/laravel app

There is an output which is actually an error shown in the above as follows :

Content-Length mismatch

In order to solve the problem, below is how to actually steps taken :

1. Check the location of the configuration of the composer used in the above command execution by typing the following command :

user@hostname:~$ composer config --list --global
[repositories.packagist.org.type] composer
[repositories.packagist.org.url] https?://packagist.org
[repositories.packagist.org.allow_ssl_downgrade] true
[process-timeout] 300
[use-include-path] false
[preferred-install] auto
[notify-on-install] true
[github-protocols] [https, ssh]
[vendor-dir] vendor (/var/www/html/vendor)
[bin-dir] {$vendor-dir}/bin (/var/www/html/vendor/bin)
[cache-dir] /home/user/.composer/cache
[data-dir] /home/user/.composer
[cache-files-dir] {$cache-dir}/files (/home/user/.composer/cache/files)
[cache-repo-dir] {$cache-dir}/repo (/home/user/.composer/cache/repo)
[cache-vcs-dir] {$cache-dir}/vcs (/home/user/.composer/cache/vcs)
[cache-ttl] 15552000
[cache-files-ttl] 15552000
[cache-files-maxsize] 300MiB (314572800)
[bin-compat] auto
[discard-changes] false
[autoloader-suffix]
[sort-packages] false
[optimize-autoloader] false
[classmap-authoritative] false
[apcu-autoloader] false
[prepend-autoloader] true
[github-domains] [github.com]
[bitbucket-expose-hostname] true
[disable-tls] false
[secure-http] true
[cafile]
[capath]
[github-expose-hostname] true
[gitlab-domains] [gitlab.com]
[store-auths] prompt
[archive-format] tar
[archive-dir] .
[home] /home/user/.composer
user@hostname:~$

2. Check the composer’s configuration which is locate in /home/user/.composer named config.json :

{
"config": {}
}

3. In order to solve the problem, just correct the content of file named config.json and change it into the following one :

{
    "config": {
        "github-protocols": [
                "https,ssh"
        ]
    },
    "repositories": {
        "packagist": {
                "type":"composer",
                "url":"https://packagist.org"
        }
    }
}

4. Try to re-execute the command as follows :

user@hostname:/var/www/html$ composer create-project --prefer-dist laravel/laravel app
Installing laravel/laravel (v5.5.0)
  - Installing laravel/laravel (v5.5.0): Loading from cache
Created project in app
> @php -r "file_exists('.env') || copy('.env.example', '.env');"
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 68 installs, 0 updates, 0 removals
  - Installing vlucas/phpdotenv (v2.4.0): Loading from cache
  - Installing symfony/css-selector (v3.3.8): Loading from cache
  - Installing tijsverkoyen/css-to-inline-styles (2.2.0): Loading from cache
  - Installing symfony/polyfill-mbstring (v1.5.0): Loading from cache
  - Installing symfony/var-dumper (v3.3.8): Loading from cache
  - Installing symfony/routing (v3.3.8): Loading from cache
  - Installing symfony/process (v3.3.8): Loading from cache
  - Installing symfony/http-foundation (v3.3.8): Loading from cache
  - Installing symfony/event-dispatcher (v3.3.8): Loading from cache
  - Installing psr/log (1.0.2): Loading from cache
  - Installing symfony/debug (v3.3.8): Loading from cache
  - Installing symfony/http-kernel (v3.3.8): Loading from cache
  - Installing symfony/finder (v3.3.8): Loading from cache
  - Installing symfony/console (v3.3.8): Loading from cache
  - Installing doctrine/lexer (v1.0.1): Loading from cache
  - Installing egulias/email-validator (2.1.2): Loading from cache
  - Installing swiftmailer/swiftmailer (v6.0.1): Loading from cache
  - Installing paragonie/random_compat (v2.0.10): Loading from cache
  - Installing ramsey/uuid (3.7.0): Loading from cache
  - Installing psr/simple-cache (1.0.0): Loading from cache
  - Installing psr/container (1.0.0): Loading from cache
  - Installing symfony/translation (v3.3.8): Loading from cache
  - Installing nesbot/carbon (1.22.1): Loading from cache
  - Installing mtdowling/cron-expression (v1.2.0): Loading from cache
  - Installing monolog/monolog (1.23.0): Loading from cache
  - Installing league/flysystem (1.0.41): Loading from cache
  - Installing erusev/parsedown (1.6.3): Loading from cache
  - Installing doctrine/inflector (v1.2.0): Loading from cache
  - Installing laravel/framework (v5.5.3): Loading from cache
  - Installing fideloper/proxy (3.3.4): Loading from cache
  - Installing jakub-onderka/php-console-color (0.1): Loading from cache
  - Installing jakub-onderka/php-console-highlighter (v0.3.2): Loading from cache
  - Installing dnoegel/php-xdg-base-dir (0.1): Loading from cache
  - Installing nikic/php-parser (v3.1.1): Loading from cache
  - Installing psy/psysh (v0.8.11): Loading from cache
  - Installing laravel/tinker (v1.0.2): Loading from cache
  - Installing filp/whoops (2.1.10): Loading from cache
  - Installing fzaninotto/faker (v1.7.1): Loading from cache
  - Installing hamcrest/hamcrest-php (v1.2.2): Loading from cache
  - Installing mockery/mockery (0.9.9): Loading from cache
  - Installing sebastian/version (2.0.1): Loading from cache
  - Installing sebastian/resource-operations (1.0.0): Loading from cache
  - Installing sebastian/recursion-context (3.0.0): Loading from cache
  - Installing sebastian/object-reflector (1.1.1): Loading from cache
  - Installing sebastian/object-enumerator (3.0.3): Loading from cache
  - Installing sebastian/global-state (2.0.0): Loading from cache
  - Installing sebastian/exporter (3.1.0): Loading from cache
  - Installing sebastian/environment (3.1.0): Loading from cache
  - Installing sebastian/diff (2.0.1): Loading from cache
  - Installing sebastian/comparator (2.0.2): Loading from cache
  - Installing doctrine/instantiator (1.0.5): Loading from cache
  - Installing phpunit/php-text-template (1.2.1): Loading from cache
  - Installing phpunit/phpunit-mock-objects (4.0.4): Loading from cache
  - Installing phpunit/php-timer (1.0.9): Loading from cache
  - Installing phpunit/php-file-iterator (1.4.2): Loading from cache
  - Installing theseer/tokenizer (1.1.0): Loading from cache
  - Installing sebastian/code-unit-reverse-lookup (1.0.1): Loading from cache
  - Installing phpunit/php-token-stream (2.0.1): Loading from cache
  - Installing phpunit/php-code-coverage (5.2.2): Loading from cache
  - Installing webmozart/assert (1.2.0): Loading from cache
  - Installing phpdocumentor/reflection-common (1.0): Loading from cache
  - Installing phpdocumentor/type-resolver (0.4.0): Loading from cache
  - Installing phpdocumentor/reflection-docblock (4.1.1): Loading from cache
  - Installing phpspec/prophecy (v1.7.2): Loading from cache
  - Installing phar-io/version (1.0.1): Loading from cache
  - Installing phar-io/manifest (1.0.1): Loading from cache
  - Installing myclabs/deep-copy (1.6.1): Loading from cache
  - Installing phpunit/phpunit (6.3.0): Loading from cache
symfony/var-dumper suggests installing ext-symfony_debug ()
symfony/routing suggests installing doctrine/annotations (For using the annotation loader)
symfony/routing suggests installing symfony/config (For using the all-in-one router or any loader)
symfony/routing suggests installing symfony/dependency-injection (For loading routes from a service)
symfony/routing suggests installing symfony/expression-language (For using expression matching)
symfony/routing suggests installing symfony/yaml (For using the YAML loader)
symfony/event-dispatcher suggests installing symfony/dependency-injection ()
symfony/http-kernel suggests installing symfony/browser-kit ()
symfony/http-kernel suggests installing symfony/class-loader ()
symfony/http-kernel suggests installing symfony/config ()
symfony/http-kernel suggests installing symfony/dependency-injection ()
symfony/console suggests installing symfony/filesystem ()
paragonie/random_compat suggests installing ext-libsodium (Provides a modern crypto API that can be used to generate random bytes.)
ramsey/uuid suggests installing ircmaxell/random-lib (Provides RandomLib for use with the RandomLibAdapter)
ramsey/uuid suggests installing ext-libsodium (Provides the PECL libsodium extension for use with the SodiumRandomGenerator)
ramsey/uuid suggests installing ext-uuid (Provides the PECL UUID extension for use with the PeclUuidTimeGenerator and PeclUuidRandomGenerator)
ramsey/uuid suggests installing moontoast/math (Provides support for converting UUID to 128-bit integer (in string form).)
ramsey/uuid suggests installing ramsey/uuid-doctrine (Allows the use of Ramsey\Uuid\Uuid as Doctrine field type.)
ramsey/uuid suggests installing ramsey/uuid-console (A console application for generating UUIDs with ramsey/uuid)
symfony/translation suggests installing symfony/config ()
symfony/translation suggests installing symfony/yaml ()
monolog/monolog suggests installing aws/aws-sdk-php (Allow sending log messages to AWS services like DynamoDB)
monolog/monolog suggests installing doctrine/couchdb (Allow sending log messages to a CouchDB server)
monolog/monolog suggests installing ext-amqp (Allow sending log messages to an AMQP server (1.0+ required))
monolog/monolog suggests installing ext-mongo (Allow sending log messages to a MongoDB server)
monolog/monolog suggests installing graylog2/gelf-php (Allow sending log messages to a GrayLog2 server)
monolog/monolog suggests installing mongodb/mongodb (Allow sending log messages to a MongoDB server via PHP Driver)
monolog/monolog suggests installing php-amqplib/php-amqplib (Allow sending log messages to an AMQP server using php-amqplib)
monolog/monolog suggests installing php-console/php-console (Allow sending log messages to Google Chrome)
monolog/monolog suggests installing rollbar/rollbar (Allow sending log messages to Rollbar)
monolog/monolog suggests installing ruflin/elastica (Allow sending log messages to an Elastic Search server)
monolog/monolog suggests installing sentry/sentry (Allow sending log messages to a Sentry server)
league/flysystem suggests installing league/flysystem-aws-s3-v2 (Allows you to use S3 storage with AWS SDK v2)
league/flysystem suggests installing league/flysystem-aws-s3-v3 (Allows you to use S3 storage with AWS SDK v3)
league/flysystem suggests installing league/flysystem-azure (Allows you to use Windows Azure Blob storage)
league/flysystem suggests installing league/flysystem-cached-adapter (Flysystem adapter decorator for metadata caching)
league/flysystem suggests installing league/flysystem-eventable-filesystem (Allows you to use EventableFilesystem)
league/flysystem suggests installing league/flysystem-rackspace (Allows you to use Rackspace Cloud Files)
league/flysystem suggests installing league/flysystem-sftp (Allows you to use SFTP server storage via phpseclib)
league/flysystem suggests installing league/flysystem-webdav (Allows you to use WebDAV storage)
league/flysystem suggests installing league/flysystem-ziparchive (Allows you to use ZipArchive adapter)
league/flysystem suggests installing spatie/flysystem-dropbox (Allows you to use Dropbox storage)
league/flysystem suggests installing srmklive/flysystem-dropbox-v2 (Allows you to use Dropbox storage for PHP 5 applications)
laravel/framework suggests installing aws/aws-sdk-php (Required to use the SQS queue driver and SES mail driver (~3.0).)
laravel/framework suggests installing doctrine/dbal (Required to rename columns and drop SQLite columns (~2.5).)
laravel/framework suggests installing guzzlehttp/guzzle (Required to use the Mailgun and Mandrill mail drivers and the ping methods on schedules (~6.0).)
laravel/framework suggests installing league/flysystem-aws-s3-v3 (Required to use the Flysystem S3 driver (~1.0).)
laravel/framework suggests installing league/flysystem-rackspace (Required to use the Flysystem Rackspace driver (~1.0).)
laravel/framework suggests installing nexmo/client (Required to use the Nexmo transport (~1.0).)
laravel/framework suggests installing pda/pheanstalk (Required to use the beanstalk queue driver (~3.0).)
laravel/framework suggests installing predis/predis (Required to use the redis cache and queue drivers (~1.0).)
laravel/framework suggests installing pusher/pusher-php-server (Required to use the Pusher broadcast driver (~2.0).)
laravel/framework suggests installing symfony/dom-crawler (Required to use most of the crawler integration testing tools (~3.3).)
laravel/framework suggests installing symfony/psr-http-message-bridge (Required to psr7 bridging features (~1.0).)
psy/psysh suggests installing ext-pdo-sqlite (The doc command requires SQLite to work.)
psy/psysh suggests installing hoa/console (A pure PHP readline implementation. You'll want this if your PHP install doesn't already support readline or libedit.)
filp/whoops suggests installing whoops/soap (Formats errors as SOAP responses)
sebastian/global-state suggests installing ext-uopz (*)
phpunit/php-code-coverage suggests installing ext-xdebug (^2.5.5)
phpunit/phpunit suggests installing phpunit/php-invoker (^1.1)
phpunit/phpunit suggests installing ext-xdebug (*)
Writing lock file
Generating autoload files
> Illuminate\Foundation\ComposerScripts::postAutoloadDump
> @php artisan package:discover
Discovered Package: fideloper/proxy
Discovered Package: laravel/tinker
Package manifest generated successfully.
> @php artisan key:generate
Application key [base64:17qkhQR6MWR6knDmhnoDB1L79Oeo/sp4l8FMeM8tIOI=] set successfully.
user@hostname:/var/www/html$ 

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